>>56959025We could start by giving Psychic an additional effect like:
Electric can't be paralyzed
Fire can't be burned
Poison can't be poisoned
Grass isn't affected by powder or spores
Ice can't be frozen
Ghost prevents escape moves
Dark can't be "tricked"
I feel like all types should have their own gimmick, I'm not including weather and terrain effects because they're more powerups than a proper type characteristic. For example making Psychic immune to being put to sleep, Water not being affected by restriction moves like Wrap, Fighting can't be confused, Fairy can't be infatuated, Bugs immune to sound-based moves.