The short answer is simple: in Scarlet & Violet, Legends: Z-A, Sword & Shield, BDSP, Legends: Arceus, and Let's Go, there is no documented wave of console bans or Switch Online suspensions tied to receiving a well-built genned Pokémon. The longer answer is worth reading, because the real risk isn't what most players assume.

What Nintendo actually enforces

Nintendo's enforcement across the mainline Pokémon games falls into two buckets:

  • Server-side rejection. A team or Pokémon that fails an online validator (Ranked Battle Stadium, Pokémon HOME, online raids) is refused at the door. The Pokémon doesn't propagate. This is what most people experience and mistake for "a ban."
  • Account-level action. Reserved for clear, egregious abuse — systemic exploitation of online services, bad-faith distribution of data that crashes other players' games, or repeated violations after warnings. It is not triggered by legally-built genned Pokémon.

The detection system isn't "did you catch this Pokémon?" — the game has no way to know. It's "is this Pokémon's data internally consistent with how the game produces Pokémon?" A legal gen passes, because its data is consistent with the game's own rules.

Game by game

Pokémon Scarlet & Violet

SV has the most active online surface of any supported game: Ranked Battle Stadium, Tera Raids, Union Circle, Link Trades. Every online feature uses a server-side validator that's roughly equivalent to PKHeX's legality check. Legal gens pass every one of these. Illegal gens are refused at team registration or raid join.

No console bans have been documented for receiving a legal genned Pokémon in SV. The story has been the same since launch.

Pokémon Legends: Z-A

Z-A's validator behaves similarly to SV's. The Z-A-specific encounter data (form switches, origin marks, move pools) is unique, which means a poorly-built gen fails fast. Correctly-built ones pass the same way any real Z-A Pokémon would. HOME compatibility for Z-A Pokémon is the single biggest filter, and anything that deposits to HOME has cleared the meaningful bar.

Sword & Shield

SwSh has the longest track record. It's also where most of the PKHeX community learned what "legal" looks like under the modern engine. Ranked, Surprise Trade, Max Raid Battles, and HOME transfers all run without ban-wave reports for legal gens. The one historical risk — very early in SwSh's life, when online validators were still being tuned — is long since resolved.

BDSP

BDSP uses a different engine than the other mainline games (Unity-based rather than the Game Freak engine family). Its breeding RNG and encounter data have quirks that PKHeX has fully mapped. Legal gens transfer to HOME cleanly. Illegal ones fail the HOME validator reliably, which is actually useful — you know immediately if something was built wrong.

Legends: Arceus

LA has the most unusual encounter system of any game in the family: Alpha Pokémon, research-level data, mass outbreak origin data, and unique hidden-value structures. That specificity means illegal gens fail HOME almost immediately. Legal gens — especially when the encounter data matches a valid Alpha or research-level pattern — pass without flags.

Let's Go Pikachu/Eevee

No ranked mode in LGPE, so the online surface is small. HOME is the main gate, and HOME treats LGPE Pokémon with the same rigor as any other source. Legal gens pass.

Where the real risk lives

The realistic failure modes are:

  1. HOME rejection on deposit. If a Pokémon fails HOME's legality check, it simply won't deposit. You don't get banned — you just can't move the Pokémon anywhere. This is the single most common "something went wrong" outcome and it's exactly why legality checking matters.
  2. Ranked / tournament validator rejection. Same idea, different gate. An illegal team is refused at registration. No penalty beyond "can't enter."
  3. Account flags from repeated illegal data. Theoretical, not well-documented in the wild, but plausible at the extreme end. Staying inside what the game would have produced puts you nowhere near this threshold.

What to do about it

Three rules:

  • Only accept Pokémon from services that run full PKHeX legality checks before trading.
  • Avoid anything marketed as "not HOME compatible." HOME is the strictest filter — anything that can't pass HOME can't safely live in your ecosystem.
  • Don't enter genned Pokémon into official VGC events. That's a tournament rule, not a detection system, but the rule stands regardless of how the Pokémon was built.

For the full picture on how detection works and what specifically gets flagged, read our Is Pokémon Genning Safe? guide.