I don't like those critters all that much. '93 is much more ballanced without them.
They add some value for single player mode, but not for multi battle sessions.
Also they have became standard in all SFC/SNES sequels, which is one of the reason, sure among others, I don't like them so much.
BM'93 is the definite classic bomberman for battle sessions to go, without having thrown in too much of rubbish or unbalancing crap.