Billy is a character and antagonist from Slugterra. He is the leader of the Hooligang. He is a teen rebel slugslinger who spends most of his time illegally tricking out his Mecha-beast to compete at the racetrack by day and by night he'll steal whatever he can get his dirty hands on. He gives Slugslinging a bad name! 
Billy first actually appeared in "The World Beneath Our Feet Part 1" & "The World Beneath Our Feet Part 2" first training with Locke and Lode at the first tournament and in the episode 2 he is watching Eli versing John Bull (seen beside the Shane gang watching) He really appeared in The Slugout episode The Hooligang was working for Dr. Blakk to convince Red Hook to work for Blakk but the Shane gang defeated him and his gang and got Doc a slug that Billy abandoned. He reappeared in Snowdance to get back to Eli for after there last seen they got fired from Blakk Industries by Dr. Blakk.
He later again takes over Quiet Lawn Cavern again in "Slug Fu Showdown" but Sally attempts to stop him and Glasses with Shorty using her Flopper slug Old Timer however failed. The Elemental Slugs arrived and aided her which send them packing out of the cavern.
- The World Beneath Our Feet Part 1 (Brief appearance)
- The World Beneath Our Feet Part 2
- The Slugout (First)
- Return of the Elementals (Mentioned)
- Slug Fu Showdown
- His favorite Slugs are Flaringo, Lavalynx, and Rammstone.
- He used to own a Boon Doc before he threw him out of his Slug Arsenal.
- His Boon Doc (Doc) now belongs to Eli Shane.
- Billy makes a cameo appearance in "The World Beneath Our Feet Part 1".
- When he puts back his Boon Doc, his Flaringo looks like if it was an Infurnus.
- He used to work for Dr. Blakk.
- His blaster looks suspicioulsly similar to Dr. Blakk's first blaster, albeit without the hammer. Perhaps back when Blakk was young, semi-auto blasters were considered more high-end equipment than they are now.