Slugball is the twenty-eighth episode of Slugterra. It premiered in US on July 3, 2013.
The Shane Gang find themselves competing in the Slugball Championship—a rough and tumble cross between hockey, slugslinging and rugby—with deadly random obstacles thrown in for fun! Eli suspects the rival team is cheating, but he's going to have to prove it first...that is if he can survive the game!
After the beast forge incident Grendel and the other trolls take up slugball, but gets injured. Kord takes over for him but after the semi final match, the entire team is injured. This leads to the entire gang taking their places, but Eli suspects that the enemy team is cheating. During the last round he sees Primo Presto hacking the traps. This causes him to leave, causing another member, Thrasher, to leave to and chase down Presto. After winning Kord gives the trophy to the other trolls, while Primo is captured by Blakk, because the sabotage to make Thrasher's team win would throw on the scientist the fault of it.
- Blade City (Mentioned only)
- Beast Forge Cavern (Mentioned only)
- Deadweed Cavern (Mentioned only)
- The Citadel
- Eli Shane
- Beatrice Sting
- Kord Zane
- Blast Vanderhuge
- Bob Johnson
- Primo Presto
- Dr. Blakk
- Sedo (Picture only)
- Max Jackson (Action figure)
- Blast and Bob said that the Beast Forge Shock & Rollers went to join the Slugball Championship after the Beast Forge was destroyed by Dr. Blakk during "The Return".