With Fakemon?
I will give some idea
Sharpshooter
Increases Crit-Rate and Accuracy for the Pokemon, Evasion boosts and Accuracy dropping moves dont work (Compound Eyes+Super Luck+Keen Eye) Maybe a bit OP but it could be for a Legendary
Forecast (something)
Summons a random weather on switch in, or a specific one based on what «weather rock » the Pokemon is holding, changes the user's form for a type matching said weather ( Give Castform an evolution or just change it)
(IDK what i call this one, id call it Adaptability, since i think t makes more sense than how it is normally)
gives a 1.5x boost to non-STAB moves, but doesnt change the user's type like Protean
Ninja
Set up moves additionally raise Evasion