A Bubbalash is the Ghouled version of the Bubbaleone. When they velocimorph, they turn into a big, black bubble with a felinoid face. It debuts in episode three, "The Trade". One was used to trap Eli Shane while he was dueling Dr. Blakk.
- Protoform Abilities - Can create small amounts of sticky foam.
- Barbaloa - Opponent is captured in a large indestructible bubble - nasty juice rolling around inside.
- Flembaloo - Spits a foamy, smelly, disgusting phlegm - makes it hard to stand or move.
- Punchball - Inflates like a pufferfish covered in spikes, to painfully rebound incoming slugs.
- The Trade (First appearance)
- Keys to the Kingdom
- Back to Blakk
- Light as Day
- Slugterra: Ghoul from Beyond
- Slugterra: Return of the Elementals
- Slugterra: Into the Shadows
- It seems Dr. Blakk's Bubblash is bigger than Bubbaleone slugs as it is enough to seal Eli in The Trade.
- Unlike Bubbaleone, Bubbalash sticks out teeth in velocity form.
- In The Trade, the Bubblash is more oval because it has Eli in its stomach.