Help me remeber my childhood fave!!

Hey guys!

i was talking to a colleague at work and we both remebered a cartoon,

It was about a group (heavy metal or punk) that were useless untill they were granted magic powers and transformed into musclebound trolls or something...

one had a guitar that made soundwaves etc
one had a $%!" load of greandes
and another had a keboard/gun all had crazy hair styles

can ANYONE help me remeber this cartoon please!!??