Building Offense — National Dex OU (2026-04)

This is the centerpiece. Everything else in the guide feeds this page: Viability Tiers is your shopping list, Common Cores gives you the engines, Speed Tiers gives you the benchmarks, the 24 Threat Pages give you the per-mon detail, and Sample Teams shows you the finished product. Here you turn a two-mon core into a clean, legal six.

Reader: an experienced player building aggressive Offense — explicitly not Bulky Offense (BO), explicitly not Hyper Offense (HO). See Archetypes §1 for the precise structural definition. The build process below is written so that at every step you can see how Offense differs from BO (you refuse the third wall) and from HO (you refuse the all-in suicide-lead race).

Legality (gen9nationaldex): Mega Evolution legal, 1/team (Mega Clause). Z-Moves legal, 1/team. Sleep moves legal. Banned: abilities Arena Trap / Moody / Power Construct / Shadow Tag; items King’s Rock / Quick Claw / Razor Fang; moves Assist / Baton Pass / Last Respects / Shed Tail. (Importing a set? Run it through the Appendix legality checklist.) See Mechanics.

0. The thesis, in one paragraph

Walls are trustworthy (Mechanics §1): typing is fixed, so the wall that checks your breaker on paper actually checks it on the field — nothing bails either side out mid-turn. That is why the meta is dominated by Bulky Offense and Balance, and it is why aggressive Offense is the demanding archetype: you cannot win a single matchup with one button. You win by sequencing — hazards chip the switches your pressure forces, two breakers on different defensive axes mean no single wall stops both, and layered speed control (Scarf + priority + natural tiers) closes before the opponent stabilizes. Offense is “force a trade every turn.” BO is “grind the long game.” HO is “win by turn 12 or die.” This page builds the middle one on purpose.

The 8-step build loop (the whole page at a glance)

Work the loop in order, but expect to revisit 2/3/5 as picks collide. The whole thing is one example team carried end to end (the Ogerpon-W + Garchomp twin breaker, core ★1), with three more cores (★3, ★2, ★4) shown at the decision points where they diverge.

1. Pick a win condition / a core

Do not start from “six good mons.” Start from the win condition: a hole you will open, and the closer that walks through it. (Archetypes §1 win condition.) The through-line of every offense core in §4 of Common Cores is one property:

Two damage-dealers that share no defensive answer. The opponent cannot bring one wall to both — so over the course of the game, something should be getting broken. This is the single idea that separates Offense from “six attackers that all die to Toxapex.”

How this differs from BO and HO at step 1

• BO picks one patient wincon (a preserved Kingambit, an Iron-Defense Zamazenta) and builds a bulky shell to protect it to turn 40. You are not doing that — you carry 2–3 distinct routes so a single revenge-kill or a bad matchup-into-one-wall doesn’t end the game.
• HO stacks 4–5 redundant setup sweepers behind a suicide lead, all of which fold to the same priority/Scarf. You carry fewer, sharper, non-overlapping threats plus the support HO refuses (a pivot, a cleaner).

Pick from the data, not vibes

Common Cores §4 ranks ten offense cores by 2026-04 teammate synergy. The aggressive backbone is ★1–★7 (all “no shared check”); ★8 is the highest-strength pair but the worst on that axis (twin Dragons share Ice/Fairy); ★9 leans BO; ★10 is a Spikes-HO seed. Start from one of:

Worked example carried through this page — Core ★1. We build the Ogerpon-Wellspring + Garchomp twin breaker. Set lines (from Common Cores ★1):

• Ogerpon-Wellspring @ Wellspring Mask · Water Absorb · Jolly 0/252/0/0/4/252 — Ivy Cudgel / Power Whip / Swords Dance / Knock Off. (This is a Water-Absorb fast SD breaker/pivot at base-110 Speed; Wellspring Mask is item-locked, so it eats hazards on entry — see §3.)
• Garchomp @ Loaded Dice · Rough Skin · Jolly 0/252/0/0/4/252 — Scale Shot / Earthquake / Swords Dance / Stealth Rock.

Two SD wallbreakers on orthogonal axes, both base-100+ Speed, one of which sets your rock. That’s the seed; the next seven steps grow it to six.

2. Speed-tier the core against 08

The moment you have two mons, plot them on the speed bands (Speed Tiers) and answer the four questions from that page’s offense angle. There is no speed shift to plan around — what you see at preview is what you outspeed (the lone caveat is Terapagos, whose Tera Shift ability triggers an on-switch form change; it sits at base 85 all game). Speed math is honest; build to a real number and it holds.

The four speed questions (every offense team must answer all four)

1. Do you beat the base-110 cluster (350)? Ogerpon-W and Diancie-M live at 350 unboosted and are everywhere. A Timid base-113+ mon (357+), or +1 / Scarf anything, clears it. If your breaker is base 110, run max+ and accept the tie/creep, or pack a faster cleaner.
2. What is your answer to the 412 Zama wall? You will not naturally outspeed Zamazenta at 412 (Speed Tiers — the 412 threshold). Pick one of: a Scarfer (Scarf Lando-T 421, Scarf Lele 475, Scarf Valiant 546), a +1 sweeper that clears it (Dragonite +1 = 426; Char-X DD = 492), or priority (Bullet Punch / ESpeed / Sucker / Thunderclap). Good offenses carry two of these.
3. Where is your revenge-killer? Value Scarf benchmarks: 525 (base 110), 499 (Chomp), 492 (base 100), 483 (URS), 475 (Lele). A 525 Scarfer outruns every other Scarfer in the pool except Scarf Iron Valiant (546).
4. Are you winning the 299/300 creep war? The base-100 neutral shelf (299) and Great Tusk (300) are the most-contested numbers; a few Spe EVs to 300–305 win the Char-Y / Zapdos / Volcarona / Tusk mirrors. Tailwind (base-100 → 656, Tusk → 600) trivializes the war for 4 turns — the strongest one-button speed control offense has.

How this differs from BO and HO at step 2

• BO answers 412 with a Scarfer + Intimidate cushions and is content to go slow elsewhere; it doesn’t need the whole team fast.
• HO answers speed with screens + raw setup and a suicide lead, accepting that revenge-killing it is the opponent’s problem.
• You need at least two of the three speed layers on every team (Archetypes §1 speed control): natural tiers, Scarf, priority. Layered speed control is your defense against opposing offense — once you’re outsped, there’s no escape hatch.

Worked example — speed-tiering Core ★1

• Ogerpon-W = base 110 → 350 unboosted (Band 2). It ties the cluster, doesn’t beat it. ⇒ Q1 says: either accept the tie or add a faster cleaner. Trailblaze is an option (Speed snowball) but eats a coverage slot — note it, hold it.
• Garchomp = base 102 → 333, but Scale Shot is +1 Speed → 499 and clears the 412 wall (Q2 answer #1, conditional on getting the boost), and Loaded-Dice Scale Shot is also a power button.
• Gap exposed: unboosted, neither mon answers 412 or the cluster reliably, and there’s no priority and no Scarf yet. This is the speed hole the rest of the build must close. It’s the most common reason a twin-breaker core drifts — flag it now and resolve it in §5 with a priority cleaner (Kingambit Sucker) and a Scarf-or-+1 revenger.

3. The hazard/removal plan (pick ONE lane)

Mechanics §6: because typing is fixed and Regenerator walls reset, hazard chip is offense’s primary currency. But the format’s #1 way to ruin an offense is to do hazards half-way. Decide the lane before slot 3.

The trap (failure mode F3): running a hazard setter and a Defogger, or a spinblocker and a Boots breaker that wants no hazards at all, makes you do neither well. Pick a lane. (Mechanics §6 closing line.)

What Offense’s hazard plan is NOT

• Not the HO suicide-lead 3-layer dump. You set SR turn one from a pivot that keeps clicking (Landorus-Therian, Garchomp, Iron Treads) and optionally one Spikes layer (Garchomp). A Glimmora/Samurott suicide lead pushes you toward the HO edge — use it only if you mean to build HO.
• Not the BO slow two-way removal war. You rarely run dedicated Defog (too slow/passive). Hazards are an accelerant that taxes the switches your pressure forces — not the win condition.

The Magic Bounce subtlety (and how to break it)

A Diancie-Mega or Hatterene lead bounces conventional status hazards back. Two answers: (a) don’t lead your setter into it - pivot, let it commit, then set; or (b) use a damaging hazard line such as Ceaseless Edge / Stone Axe, which bypasses Magic Bounce because the hazard is attached to a damaging move. Against Gholdengo on the other side, removal is blocked while it is positioned, so flip to breaking Gholdengo (special breaker behind Future Sight, Ground coverage, Shadow Ball pressure, or Nuzzle bypasses Good as Gold as a legal damage-plus-paralysis cripple, Mechanics §5).

Worked example — Core ★1’s hazard lane

Garchomp already sets Stealth Rock, and Ogerpon-W is a frail-ish breaker that also wants to switch in repeatedly — both point to hazard-stack. ⇒ Slot 3 = Gholdengo (the data agrees: Samurott→Gho 49.41% for the same reason; Garchomp’s rocks need a spinblocker to stick). This is the single most repeated support pick in the whole core list — internalize “breaker core + Gholdengo” as the default seed. We are now at 3/6, hazard lane locked.

4. Pivots / momentum (without going bulky)

This is the step where Offense most often rots into Bulky Offense — so it has the hardest rule:

≤ 1 genuinely defensive body, and it pivots — it does not wall. (Archetypes §1, Glossary.) Offense runs ~4–5 attackers + momentum with at most one bulky pivot/removal slot. The moment you add a third passive body (Toxapex, defensive Gliscor, Clodsire, Corviknight, a second Regen wall) you have built BO. Stop.

The legal single-slot pivots (pick the one that also does a job)

• Landorus-Therian (A+) — Intimidate + U-turn + Stealth Rock in one slot. Buys switch-ins without slowing you; U-turns your slow breaker in safely; Scarf variant doubles as the revenge-killer (the §2 answer to 412). The canonical glue.
• Great Tusk (A) — offensive Ground that Rapid Spins your side clean while still hitting; the Boots-lane pivot.
• Slowking-Galar (A+) — the one slow pivot you’re allowed, and only if you’re running the Future-Sight engine (★2): FS + Chilly Reception is momentum-with-damage, not a wall.

The anti-synergy rule that keeps you fast

Run only ONE slow pivot. (Common Cores §6 / Anti-synergy.) Slowking-G + Slowbro, or Slowking-G + Alomomola Flip Turn + Tornadus U-turn, drowns offense in passivity — you generate momentum with no one fast to convert it. One slow pivot, then a fast cleaner. Future Sight (Mechanics §4) is the exception that earns its slot: it is damage, doubling up as your breaker enters.

How this differs from BO and HO at step 4

• BO wants 2–3 Regen/Wish/Roost bodies here. Each one you add is a turn you don’t spend pressuring — exactly the tempo BO trades away on purpose. You refuse it.
• HO runs ~no pivots and accepts that a missed lead = a lost game. You take one momentum pivot so a breaker can re-enter safely — the single edge you have over HO.

Worked example — Core ★1’s pivot

We need: a hazard-less momentum source (Ogerpon-W is item-locked into Wellspring Mask, so it can’t hold Boots and hates re-entering into rocks — note this), and ideally one more rock-setter is redundant since Garchomp already has SR. ⇒ Slot 4 = a non-redundant pivot. Landorus-Therian would double Garchomp’s Ground STAB and Ice/Water weaknesses (anti-synergy: “redundant Ground,” Common Cores §6), so instead take Slowking-Galar — Future Sight chips the bulky Waters/Steels that wall Ogerpon, Chilly Reception pivots a breaker in, and Regenerator keeps it healthy without being a wall. Ogerpon↔Slowking shares no Ground redundancy and the FS chip is the twin-breaker accelerant. We’re at 4/6: Ogerpon-W, Garchomp, Gholdengo, Slowking-G.

5. Breakers + cleaners + speed control

You have a breaker core, a spinblocker, and a pivot. The last two slots must, together, (a) add a second/third axis of breaking, (b) provide a cleaner to close, and (c) close the speed holes from §2. On Offense these three jobs collapse into one or two mons — that density is the archetype.

The three roles, and the mons that fill them

Breakers (the engine). Pair mixed/dual-category breakers to overload single-typed walls (Archetypes §1 breakers):

• Iron Valiant — physical/special/mixed + Encore (an aggressive tempo tool that manufactures a setup turn by locking a wall into a status move). Top Speed tier (Booster/Scarf → 546).
• Kyurem — Freeze-Dry punishes the bulky Waters that wall everything else; the canonical answer to the Ground/Water/Flying balance backbone.
• Tapu Lele — Specs nuke whose Psychic Terrain blocks priority targeting grounded Pokémon (it protects your grounded sweepers from Sucker/ESpeed).
• Ogerpon-Wellspring, Garchomp, Urshifu-Rapid-Strike, Raging Bolt.

Cleaners (the closer). A boosting or priority threat that walks through the hole after the break (Archetypes §1 closers):

• Kingambit — Supreme Overlord climbs +10%/fainted ally; Sucker Punch closes through faster mons. The canonical hazard-stack cleaner — it scales with the carnage your offense creates (Mechanics §5).
• Dragonite (Extreme Speed + DD, Multiscale), Zamazenta (412 breaker/cleaner), Scizor-Mega (Bullet Punch).

Speed control (the three layers — keep ≥2):

1. Natural tiers — Iron Valiant and Booster/Quark-Drive boosters sit at the top.
2. Choice Scarf — Scarf Gholdengo (439), Tapu Lele (475), Landorus-Therian (421, the cheap 412-answer on a glue mon).
3. Priority — Kingambit Sucker, Dragonite ESpeed, Raging Bolt Thunderclap, Scizor-Mega Bullet Punch.

The “two breakers on different axes” rule, restated for slots 5–6: your second/third damage-dealer must sit on a different defensive axis than your first (Common Cores §6). Two Steels (Kingambit + Gholdengo + Scizor-M) share Fire/Fighting/Ground pressure; two Dragons (Char-X + Dragonite, or Garchomp + Kyurem) are both pressured by the same Ice/Fairy click. Keep checking the no-shared-check property as you fill out the team.

How this differs from BO and HO at step 5

• BO runs one heavy breaker grinding behind its walls; the rest of the team is support. You run two breakers + a cleaner and lean on speed, not bulk, to survive between hits.
• HO has all sweepers and no cleaner role — every mon is a wincon, none is the insurance that closes after a wincon trades. Your cleaner (esp. Kingambit) is the structural piece HO lacks.

Worked example — finishing Core ★1

At 4/6 we have a physical-leaning core (Ogerpon-W, Garchomp both physical) + a special pivot (Slowking-G FS) + Gholdengo. The speed hole from §2: no priority, no clean 412 answer.

• Slot 5 = Kingambit (Black Glasses · Adamant 252/252/0/0/4/0 — Sucker Punch / Knock Off / Iron Head / Swords Dance). It is the cleaner (Supreme Overlord scales as the twin breakers trade), the priority layer (Sucker bypasses normal Speed order), and it shares no check with Ogerpon-W (the Steels that wall Kingambit eat Ivy Cudgel; Ogerpon↔Kingambit is mutual 22.28/29.00). Slowking-G’s Future Sight + Chilly Reception brings it in safely — that’s core ★2 nested inside ★1, the format’s defining engine.
• Slot 6 = the revenger that answers the cluster + 412. We still lack a non-priority answer to fast threats and to Zama on a turn Kingambit’s Sucker is read. Take Scarf Landorus-Therian — but that re-introduces the “redundant Ground with Garchomp” tension. Resolve it by dropping Garchomp’s rock onto Lando and freeing Garchomp is not the move (you’d lose a breaker); instead accept Lando-T as the Scarf revenge + Intimidate cushion and keep its EQ for revenge only, not as a breaking STAB — the redundancy is tolerable because one is a breaker and one is a Scarf revenger, and Intimidate + the second Ground-immune problem is real but manageable. Cleaner alternative: if you’d rather avoid the Ground stack entirely, run Scarf Tapu Lele (475) — a special revenge breaker on a fresh axis whose Psychic Terrain also shuts off opposing Sucker Punch into grounded targets. (Terrain tension: it would also blank your own Kingambit Sucker into grounded targets — see §8 F4. Since Kingambit is your cleaner-priority, Scarf Lando-T is cleaner for this worked example unless you deliberately rebuild around terrain turns.)

Final ★1 six: Ogerpon-Wellspring · Garchomp · Gholdengo · Slowking-Galar · Kingambit · Scarf Landorus-Therian. Two breakers (Ogerpon/Chomp) + FS pivot + spinblocker + priority cleaner + Scarf revenger/Intimidate. Speed layers present: natural (Ogerpon 350, Chomp +1 499), Scarf (Lando 421 > 412), priority (Kingambit Sucker). Three layers — exceeds the minimum two. This is the spine of Offense sample team 09.

6. Answering the S/A threats WITHOUT a defensive core

This is where aggressive Offense is hardest and where the instinct to add a wall is strongest. The rule: answer the top threats by out-pacing, over-powering, or trading — not by walling. Adding a counter (a dedicated wall) for each scary mon is how you build BO. Below, each S/A threat gets the offensive answer.

The general method, restated from Common Cores §5: the format’s defensive spines (Alomomola + Lando-T; Gliscor + Toxapex; Alomomola·Gholdengo·Lando-T) win by recovering (Regen/Poison-Heal/Wish) and denying (Defog / Rapid Spin / Gholdengo’s dual denial / Haze). You beat them by denying recovery turns — apply a threat every turn so each switch costs HP, twin-break so no wall covers both, Knock Off to strip Boots/Lefties/Toxic-Orb, and force trades faster than they heal. Never out-stall.

S Rank

• Gholdengo (S, 20.42%) — the spinblocker that makes their hazard-stack work and the GaG wall that ignores your targeted status moves. Offensive answers: break it with a special breaker behind Future Sight (Slowking-G FS → your Specs hit lands the same turn); Ground/Dark/Ghost coverage (it’s weak to EQ — your Garchomp/Lando EQ, Iron Valiant Shadow Ball / Knock Off pressure); Nuzzle bypasses Good as Gold to para it (Mechanics §5); or just out-offense it — it’s not fast (Scarf 439), so a Scarf Lele/Valiant revenges the NP set. On your side, Gholdengo is your spinblocker (see §3).
• Zamazenta (S, 19.67%) — the 412 wall and premier physical breaker/ID-Press pivot. Offensive answers: priority (Kingambit Sucker, Dragonite ESpeed, Scizor-M Bullet Punch, Raging Bolt Thunderclap — Zama can’t outrun a priority KO once chipped); a Scarfer ≥ 421 (Scarf Lando-T exactly clears it, Scarf Lele/Valiant blow past); and Fairy/special pressure (it’s a frail-ish special target — Tapu Lele Moonblast/Specs, Ogerpon-W Ivy Cudgel into the Crunch set). Do not try to wall ID-Press with a steel; race it.

A+ / A Rank

• Landorus-Therian (A+, 19.53%) — the glue you’ll both run and face. Answers: Water/Ice/Grass breaks it (Ogerpon Ivy Cudgel, Kyurem Ice, Slowking FS); it’s slow (309 max+), so your natural-speed breakers move first; Intimidate makes it a cushion, not a counter — overload it.
• Kingambit (A+, 14.27%) — their cleaner. Answers: its own block lists its checks — Iron Valiant, Great Tusk, Zamazenta, Skarmory. Fighting coverage + faster Fairies; don’t click into a Sucker read — Encore (Valiant) or a Fighting move on the predicted Sucker turn. Tapu Lele’s Psychic Terrain blocks Sucker Punch into grounded targets.
• Ogerpon-Wellspring (A+, 10.97%) — the most format-defining breaker. Answers: bulky Grass-resists you can also threaten (a Steel that isn’t passive — but on Offense prefer to revenge it: it’s base 110/350, so Scarf Lele/Valiant or a +1 cleaner outpaces; Knock its Wellspring Mask is impossible since it’s the form item, so chip + priority).
• Garchomp (A+) — Ice/Fairy/Water; revenge at +1 (its Scale Shot puts it at 499, so a Scarfer ≥ that or priority).
• Dragonite (A+) — Multiscale means you must chip first (hazards!) before a revenge sticks; then Ice/Fairy/Rock + a faster priority. Keep your SR up — this is why your hazard lane matters.
• Great Tusk (A, plays like A+) — Grass/Water/Fairy; it’s a spinner, so if you’re hazard-stack, re-pressure it so it can’t spin safely; Slowking FS + a breaker overloads it.
• Gliscor (A, 15.82% — the audit-omission threat; always account for it) — Poison-Heal SD wall/breaker. Answers: Ice/Water (Kyurem Freeze-Dry/Ice, Ogerpon Ivy Cudgel), Knock Off to strip Toxic Orb (kills Poison Heal), and raw power that 2HKOs through Recover; Taunt (Lando-T) shuts its recovery. It is not a mon you out-stall.
• Terapagos (A, 17.33%) — plays as Terapagos-Terastal via the Tera Shift ability (its on-switch form change). Treat it as a fixed bulky special breaker at base-85 Speed (295 max+). Answer: it’s slow — outpace and trade; special-wall-breakers and faster cleaners handle it.

B+ engines (you’ll mirror these)

• Iron Valiant (12.33%) — frail; faster offense + priority revenge it (its hardest check per its block is Volcarona — keep rocks up). Raging Bolt (12.29%) — its checks are Tapu Lele, Ferrothorn, Chansey, Char-X; fast Ground/EQ + Unaware fat. Scizor-Mega (8.80%) — Fire pressure; it’s a priority pivot, not a sweeper, so out-power it.

The summary rule: notice that none of the answers above is “add a wall.” Every one is a breaker, a Scarfer, a priority move, a Knock, or a Taunt — pieces you were already slotting for offensive reasons. If you find yourself adding a defensive Pokémon specifically to check a threat, you are building BO. Re-route the answer to one of your attackers.

Worked example — does Core ★1 answer the board?

• Gho: Garchomp/Lando EQ + Slowking FS. ✓ — Zama: Kingambit Sucker + Scarf Lando 421 + Ogerpon Ivy. ✓ — Lando-T: Ogerpon Ivy + Slowking FS. ✓ — Kingambit (mirror): Ogerpon (faster), Garchomp, Scarf Lando. ✓ — Dragonite: SR (Garchomp) chips Multiscale, then Scarf Lando Ice/Stone Edge or Kingambit priority. ✓ — Gliscor: Ogerpon Ivy Cudgel + Knock; Kyurem-less, so this is the thin answer — flag it (see §8 F7). — Great Tusk: re-pressure (it can’t spin into Ogerpon/Kingambit). ✓. The board is mostly covered with zero dedicated walls; Gliscor is the one soft spot, which is the correct kind of honest weakness for Offense (you race it, you don’t seal it).

7. The Mega slot + the Z slot

One Mega, one Z, per team (Mechanics §2–3) — your only extra mechanics, so they matter a lot. Budget them like hazards: spend each on the biggest hole, and never double-allocate.

The Mega decision (pick FIRST when a Mega is core; stats undercount Megas)

The strong Megas are mutually exclusive (Common Cores §6):

• Scizor-Mega — Technician Bullet Punch priority + SD pivot. The premier priority on offense; take it when your team lacks a priority layer and wants a slow U-turn.
• Diancie-Mega — Magic-Bounce anti-hazard lead + mixed breaker. Take it to win the hazard war by default on a fast shell (Cores ★7/★10).
• Charizard-Mega-Y — Drought special nuke; take it only if you’re committing to sun.
• (Char-X DD physical breaker, Latios-M special pivot — table-tier but real.)

Rule: if a Mega is part of your core (★7 Diancie, ★8 Char-X, ★9 Scizor, ★10 Diancie), it is your only Mega — you cannot also run another. If your core is Mega-free (★1, ★2, ★3, ★4, ★5), the Mega slot is a free upgrade you spend on the biggest structural gap (usually Scizor-M for priority, or Diancie-M to flip the hazard war).

The Z decision (the one-time trump)

A damage Z turns a 2HKO into an OHKO at the deciding moment; a status Z is a one-time boost/heal. Z-output BP scales: ≥130 base → 195, ≥120 → 190, ≥110 → 185, ≥100 → 180, ≥90 → 175 (Mechanics §3). Common offense Z lines:

• Gholdengo + Steelium-Z → Corkscrew Crash (the Z-output of Make It Rain — never a chosen move; list Make It Rain + Steelium Z). A one-time wall-break that one-shots a Steel/special wall.
• Kyurem + Groundium-Z, Dragonite + Flyinium-Z (Z-Fly nuke), Tapu Lele/Ceruledge Z-breakers, and Tapu users + Tapunium-Z (Guardian of Alola) when they run Nature’s Madness.

The collision check (failure mode F6): never slot two would-be Megas (Diancie-M / Scizor-M / Char-X are mutually exclusive) or two Z-reliant sets — the second is dead weight. And remember Ogerpon-W’s item is locked to Wellspring Mask, so it cannot hold the team Z; budget the Z elsewhere.

How this differs from BO and HO at step 7

• BO often spends the Mega on a bulky anchor (Venusaur-M Thick Fat, Tyranitar-M sand/Pursuit) — a wall. You spend it on offense or tempo (priority, hazard-denial, a nuke).
• HO spends the Mega on a frail nuke or a Magic-Bounce lead and the Z on a setup sweeper’s one-shot. You can do the latter, but you also keep the cleaner/pivot HO drops.

Worked example — Core ★1’s Mega + Z

Core ★1 is Mega-free (Ogerpon Mask, Garchomp Dice, Gho Balloon/Z, Slowking Boots, Kingambit Black Glasses, Lando Scarf). The biggest structural gap is the thin priority/special-break noted in §5/§6 (Gliscor, fat Steels). Z → Gholdengo + Steelium-Z (Make It Rain → Corkscrew Crash): a one-time delete of the Steel/special wall that would otherwise eat both Ogerpon and Make It Rain, opening the late-game for Kingambit. Mega slot is unspent → free upgrade: swap Scarf Lando-T’s revenge job onto Scizor-Mega if you want a second, item-free priority layer and a slow U-turn that pivots Ogerpon in — but that costs the Scarf 412-answer, so you’d re-add Scarf elsewhere. For the canonical ★1 build, leave the Mega unspent (or run Scizor-M and move Scarf to Lele) and keep Steelium-Z Gholdengo as the trump. Decision logged; no double-allocation.

8. Common offense failure modes & fixes

The nine ways an aggressive-Offense build dies on the test ladder — each with the diagnostic and the fix. Most are Offense quietly becoming BO or HO.

The final 60-second checklist (run before you save the team)

• Win condition is two damage-dealers that share no check. (§1)
• ≥ 2 of the 3 speed layers (natural / Scarf / priority); an explicit 412 answer; you beat or tie 350. (§2, §5)
• One hazard lane, with its keeper (Gholdengo or Tusk/Treads). (§3)
• ≤ 1 passive body, and it pivots. No second slow pivot. (§4)
• A cleaner (Kingambit / Dragonite / Scizor-M / Zama) that closes after a break. (§5)
• Every S/A threat has an offensive answer, not a wall. Gliscor and Alomomola explicitly accounted for. (§6)
• Exactly ≤1 Mega and ≤1 Z, each spent on the biggest hole, items not double-booked. (§7)
• One Mega, one Z, max; Corkscrew Crash only as a Z-output (never a chosen move). Imported sets cleared against the Appendix legality checklist.

See also

• The cores you grow from: Common Cores §4 (offense cores ★1–★10); the defensive cores you overload (§5); the anti-synergy pitfalls (§6).
• The finished products: Sample Teams (Offense first — Core ★1 = team 09, ★6 = team 07, ★10 = team 05).
• The benchmarks: Speed Tiers (412 wall, Scarf ceilings, Booster lines, the 299/300 creep war).
• The threats, in depth: Top Threats index — each closes with an ★ Offense angle mirroring §6.
• The shopping list & the rules: Viability Tiers · Archetypes · Mechanics/Legality · Matchup Matrix · Glossary.