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The type chart reverts to Gen 1, meaning ghost cannot hit psychic, Dragon can only do neutral damage, fire no longer resists ice, and bug and poison are super effective against each other.
Pokemon who move first gain a +1 crit modifier against a slow target.
Rage users are infinitely locked into it.
Explosion and Selfdestruct revert to pre gen 5 nerfs.
Camouflage gives BIRD typing.
Psychic moves are boosted with the message as shown.