The Lavalynx is an earth element Slug, although previously unnamed. In protoform it looks almost like a Bubbaleone except for the colour scheme. When transformed it looks similar to a transformed Armashelt but without the pincers. They are a red and brownish-black Slug whose main attacks are related to lava. A Lavalynx can be very dangerous as said by Eli Shane in "A Distant Shore".
- Protoform Abilities - Can generate heat like a small furnace.
- Fullcano - Creates miniature volcanic eruption of lava on impact.
- Moltera - Opens up a lava-filled trench as it flies over, a wall of heat that burns anything shot across it.
- Magmatic - Surrounds itself in a ball of lava before hitting target.
- Geyservault - Can spit a stream of molten lava at a target.
- The Slugout (First appearance)
- Club Slug
- Shadows and Light
- A Distant Shore (Mentioned only)
- The Journey Home
- Deep Water, Dark Water
- Light as Day
- Slugterra: Eastern Caverns
- The protoform Lavalynx doesn't share any appearance characteristics with the transformed Lavalynx.
- When the Lavalynx transforms, it curls up into a ball then opens up transformed.
- Munch used against Eli in The Journey Home.
- The Lavalynx slug is the only slug shown in the series as a serious threat to people, such as when Eli gets nervous when Gar Revelle aims a Lavalynx at Kord.