AU where Hiro is kidnapped and turned into a talking chimera (based on Nina Tucker from Fullmetal Alchemist)
*makes angry noises because WHY WOULD YOU DO THIS TO ME?*
Okay, but like, if he was fused with Mochi, who also got taken with him? So he’s a talking cat person thing? And Tadashi has to deal with the fact that he might not get his brother and pet back (and that’s the worst because it’s already unimaginably painful that he’s lost Hiro, but then losing Mochi at the same time is just salt in the wounds)
The entire nerd lab devotes all of their energy to finding a cure. They’re all brilliant, surely they can think of something. And then Hiro gets involved too because he REFUSES to be stuck as a cat for the rest of his life. It’s tricky though, because he doesn’t have hands so he can’t type or hold things or really do much of SCIENCE, but that’s where Baymax comes in as his personal assistant.
And maybe he’s stuck like that, but Hiro will make it work. He’ll just have to find another angle. (He totally becomes like this cat beast man thing fighting crime on the streets. Tadashi is now stressed out because he has to go rescue Hiro from crime fighting instead of bot fighting. Basically not much has changed)