Saw the dress up theme and I knew I had to do it again after so long.
So yeah, hopefully this character is guessable but I will give a few hints :'D
-A videogame character, debuted on the Nintendo 3DS.
-Appeared on a fighting game on the 3DS, Wii U and Switch.
-In their game their known to read books and think clever tactics for battle.
I think that's all the hints I could come up with, good luck with guessing!