While I was playing offline, My Raiden used the Level 2 Super on Fat Princess while she's on the chicken. But I kinda missed her and she gets away, still riding the chicken. I was shocked when her Level 2 Super is still ongoing, even the timer ran out. Then I was like "HOLY S***! SHE'S ON THE KILLING SPREE!!!!". Unfortunately, me and other CPUs couldn't stand a chance to kill her (because that's the only way to stop it), but the match ended with her killing 11 times.
I went to Practice Mode to analyze that weird glitch. Seems like I stunned her right before her Super timer runs out!
Theres loads of ways you can trigger 'infinite-chicken'. I have quite a long list now! I only use them if I happen to be Fat Princess in a match with a dirty spammer though. I'm sure regular Fat Princess players must have discovered quite a few themselves by now!