Re: What is the most outrageous B$ power that you have encounted.
My best friend once put together a character called 'BONSAI'. His main schtick were various flavours of a high-powered Transformation Attack (with Autofire) that basically shrunk the target. Repeatedly. One power slot would shrink only people, another would shrink only their clothes, and so on. The Character's warcry was "Bonsai!". Yes, he was Japanese - take all this as a measure of my friend's sense of humour.
For the first session, the GM threw a monster at the party - try to imagine a mutated Megalodon on steroids, that comes fairly close. First round of combat, Bonsai shrunk said monster down to about goldfish-size. The party then installed the monster in a decorative aquarium in their base.
After that experience, the GM went back to running D&D.