So have I (bought all her dlc), I love her Halloween costume. She doesn't really have fighter wear, when you want to look the part all you can really go for is her kimonos & her C2 with the fluff ball wrist attachments.
Oh, there's that weird sports costume which looks kinda fight-like... reminds me of that sport where the girls ride around on roller skates and try injure each other. Roller derby? or is that something else...