[...

Give him a minute, Emmet.]

So you're saying that even mammals lay eggs.

[Images flash through his mind of feline Pokémon, like Liepard and Litten, other assorted mammals, like Mightyena and even Zoroark.]

That would make them all monotremes, but that still doesn't explain...

[But then, he mentioned egg groups.]

You mean to tell me that, scientifically speaking, bats are considered genetic relatives to birds.