Kage's Jagged Tail

i think u get this from the arcade mission break 4 walls in 2 rounds or somthing, but i've been waiting forever at lei fei's stage, sarah's stage and akira's stage, like, losing on purpose about 381275873512 times, but the mission wouldnt com up, does it have to be on stage 4 or 8 or somthing? can somone give me an answer?

 

I completed this mission with my Aoi in Lei Fei stage 4. I dont think theres any tricks for getting it, but you could try breaking some walls before losing the match. I did that ( to get myself out of the ring ), but I cant say it has nothing to do with getting the mission.