Underfist

Underfist Theme Song is a song from the The Billy and Mandy Halloween special, Underfist: Halloween Bash.

Lyrics
When monsters come to wreck your town And you need heroes to rescue you And the Superfriends just ain't around Then Underfist will rescue you.

It's what they do, Oh yeah! Oh yeah! Oh yeah! Oh yeah! Oh yeah!

Under... Under... Under, under, Underfist! Under, under, Underfist!

When the underworld attacks And candy monsters run amock And you're eaten by some form of snacks Then what you need is a magic duck!

Underfist, they're free! Oh yeah! Oh yeah! Oh yeah! Oh yeah! Underfist, go!