For context, this is about the show "WordGirl". If you've seen the original shorts, you know what I mean.

If I had a nickel for every time that Tom Kenny voiced a tragic scientist character who had something on their head (mouse brain or magic crown) drive them insane, I'd have two nickels. Which isn't a lot, but it's weird it happened twice.

yeah that's kinda weird

who's the other guy he voices?

The Ice King/Simon Petrikov from Adventure Time.

I've never watched adventure time

If you get the chance, I recommend that you watch it. Especially the episode "Holly Jolly Secrets". The show in general is really good.

Steven Boxleitner didn't deserve what happened to him. Poor guy... ;_;