Pyros is one of the four fictional Titans that Hades sets free in Hercules. He is a hunchback, and is made entirely of lava, and has yellow eyes. Being made of lava, he can melt things with any part of his body. He can also belch lava from his mouth.
Pyros is defeated when Hercules uses Stratos to suck up Pyros and the other two Titans and then flings Stratos and the others into outer space.
His name could be referring to the greek word "πυρός" which means "fire".