There are a bunch of Galactic Heroes (cute 'lil Star Wars figures) that I've been considering modding into custom figures (but never get around to it) when I got the notion that the Super Hero Squad figures would make perfect X-Babies figues. They are pretty much ready to go right out of the package. "But why a Mega?" you might ask..
The X-Babies are really best when they gang up together as a team. Take your Republic gunship and remove the ship. Tie the string to Storm or Rogue. Have Colosus stand in front and attach a gun over his shoulder to the 'pyramid' base that the Gunship rests on and attach Wolverine to a missle = FASTBALL SPECIAL. Drill a hole through Cyclops' head and stick a gun in there. And not every X-Baby needs to be a striker or shooter. Give your Mega a special power or two to replicate some mutant abilities like teleportation and then glue ol' Nightcrawler to one of the targets in front. There's 100 points of stinky diaper carnage to be had.