>>438937994v1, you are limited to a single Pokémon, and have a team with 3 other people.
No items.
Opposing Pokémon can use three moves a turn, one of which can become a Max Move.
One of its moves (that doesn’t use up a move slot) is to disable all Pokemon’s abilities and undo stat buffs on your team and remove stat debuffs from itself.
If you faint, you cannot act next round, and then your Pokémon is sent out at Max HP the round after.
Once your team hits 4 faints, or round 10, you lose.
Opposing Pokémon is immune to status conditions.
Opposing Pokémon starts with a shield that blocks the first 6 damaging attacks against it, reducing their damage by 90%. Max moves lower take up two uses of this shield but still have their damaged reduced. When the last shield breaks the opposing Pokémon gets lowered Def and Sp. Def (which it removes next round with its self cleanse)
Any damage that would reduce the opposing Pokemon’s health below a certain threshold is prevented, and another 6 shields are added. Usually at 50% health.
Only one player can dynamax their Pokémon, with the player that has the option to dynamax rotating each round.
These are the rules for all Max Raids. Most of these are against a level 60 Pokémon so you can just cheese with level 100 Pokémon pumping out enough damage to ignore the shields. Max Mewtwo was a 3 day event against a level 100 Mewtwo, so cheese strats didn’t really work on it.
The whole thing was clearly a trial run for the Legendary Pokémon Dens getting added in Crown Tundra, so you can expect to see one of those for pretty much every legendary in the game.