So whatever happened to Mutagen Man.

[neatoman]

I'm almost done rewatching season and it got me thinking, whatever happened to the Mutagen Man after the invasion?

The last we saw of him was Donnie abandoning him during the retreat, saying that he'd thaw out sooner or later. When we get back to lair it turns out the Kraang planted a drone that kills any living thing there.

So the best case scenario for Timothy is that the Kraang took him for experimentation, otherwise he's dead.