Haha, how can you stop them if they're way into their new personas and forms. I dare say if you can't beat em join em.

"Wuzzat? Bein' a hero? *SNORT!* Dat's a good one, pal!" "Yeah, we's gots a routine tah rehearse! Ain't got no time for no hero act!" "Say, Boss wuz thinkin' bout adding a third, yeah?" "Hmm, well if he weren't, Ah'm sure he won't mind! C'mon pal, we'll get ya ready fer t'night in no time flat!"