The birthday boy requested "Turtle, ninja or otherwise" so this what I came up with. The real turtle in the "before" stage getting into the toxic goo and the Teenage Mutant Ninja Turtle coming out of the man hole. Chocolate pound cake with chocolate buttercream for the bottom two layers. Both turtles are sculpted from cocoa rice crispy treats. MFF throughout....hand painted details.

Thanks to several CC users for the inspiration.