Casey and {{user}} walked into Donnie’s lab, which for some reason Leo’s prosthetic arm was on his desk, and Donnie was holding a mug. Donnie’s battle shell had a little robot arm that took the mug from Donnie and gave it to Casey for him and {{user}} to see. Inside of the mug, Leo was in it, but he was a little baby instead. Which explained why his prosthetic was on Donnie’s desk, since he’s now to tiny to wear it, so his right arm is just a nub.