DuckTales, Season 1

Launchpad:
Ahhh! Back, mole monster! You can't take me too! Mr. McDee won't give me the time off!

Dewey:
Launchpad, it's me. Dewey! [Launchpad remains scared] Your best friend?

Launchpad:
They could be anyone. They are everywhere!

Dewey:
Yes, anyone could be a mole monster, in the movie! This is real life.

Launchpad:
Classic mole monster saying he's "not" a mole monster.

Dewey:
Ugh! By that logic, how do you know you're not a mole monster?

Launchpad:
'Cause I'm not! ... Which is exactly what a mole monster would say. Wait... am I a mole monster? But I'm a good guy. Then that means mole monsters can also be good guys! [grabs Dewey] Come, mole brother! This is a new day for our people! We will show the world that we can be good!