Gen Fu, Brad, Leon, Rig, and Ayane and hayate, but it varies depending on which character I use against them.
Free Step Dodge
KasumiLover
Mayor-Of-Mustard
aKIRA AND KOKORO ON STAGE 5 LEGEND ARCADE, started again from stage 1 and it was worth it, they didn't even appear at all
Mama
Phase 4,mila and rig,its a pain in the @$$ when I fight against phase 4 in online and offline mode
KnacKrover
I really want to add Akira and Jacky as they're both pain in my a$$ guess TN never seen the problem and go fix it.
ChaolanLegacy
Eliot, Lisa/La Mariposa, the VF characteers except the Bryant's(maybe), but sometimes, my worst opponent is myself.