This is a TMNT fan fic idea I had, basically Mikey is mind controlled my Shred-head for five years and stuff, can't be bothered explaining the plot. But yeah, these are 2 sketches on Mike's changes. 

Turned out bad, but. It's been crumpled.

 Changes: Black mask, over head. Scar across lip(forgot that on chest up pic) nun chucks have spikes.  Black wrappings on heels. Failed his arms! (Oops) arms made of metal, but covered with black cloth to hide.Foot symbol on belt. But yeah, that's that.