Do think Donnie has some sort of mutant almanac?
 

Do you think that Donnie would have files on all mutants that they have seen and fought? It would make sense given that he had to create a retro-mutagen, so he would had to make a list of them and categorized into types that are base on how they were effected by the mutagen.

You mean like a Pokedex? Most of the mutant names sound like Pokemon names anyway.

I'm surprised they haven't rounded them all up in capsules or balls or something.

Snakeweed! I choose you!

Ice Cream Kitty uses Fury Swipes attack!

It's not very effective!

Or more
like a mutation level scale from the x-men.