whenever my mimikyus costume “busts” my pikachu spends all the time it takes til its fixed helping mimikyu make it look good again. the first time her costume busted my mimikyu cried and pikachu hated that so now they have some together time fixing it! just wanted everyone to know the mimikyu and pikachu rivalry is merely depending on the specific pokemon, but they really can get along just fine!!

This is indeed very true, anonymous, especially when it comes to tamed mimikyu and pikachu. Oftentimes, tamed pokémon will recognize their relationship as a sort of family to each other over inherent rivalries, so even supposed mortal enemies such as mimikyu and pikachu can get along quite well if their trainer understands how to meet their needs equally (both physically and in terms of affection) and provide them with a comfortable setting to interact.