Endangered Species.On a very slow and painful day (thanks to Pronto's home cooking) Trixie talks the gang into a slug hunt for the rare and near-extinct Enigmo slug. As they arrive they find out that they aren't the only ones hunting for the Enigmo, minus one couple waiting to simply buy it. Eli and his gang try to talk the other hunters to stop cutting down the forest because it is also destroying the other native slugs habitat, they agree that cutting it down is a bad idea and decide to simply smoke the Enigmo out with Flaringos. During the fight between them, Eli stumbles onto a deadly slug trap and a slug about to fall in it! Eli quickly saves it and returns to the dueling area to tell the hunters off for how dangerous their traps are and how the slug was almost seriously hurt. To Eli's surprise Trixie reveals that the slug he saved is the Enigmo, at that moment the true owner of the trap, a feared slug hunter named Stocker, who demands the Enigmo and the trap back. When Eli refuses a shoot-out between the gang, Stocker and his slughounds ensues with Eli using the Enigmo and getting hit by it in a backlash, Trixie saves Eli and asks what did the Enigmo look like when it transformed to which he replies he wouldn't know cause his vision became distorted. Now the gang must find the slug, evade Stocker and his hounds and guide Eli around, during the hunt for the slug each member tries to save it from one trap after another since it seems to enjoy playing near or on them. Kord gets shot with a hundred slug tranquilizes, Trixie is caught in a cage and Pronto gets caught in a pit trap (ironically) leaving Eli to face off against Stocker and his hounds solo. After pulling off some good evasive maneuvers and using Chiller and Spinner to swing away from the hounds only to crash and get cornered by Stocker, who now has the Enigmo. With Eli keeping him busy, Burpy talks one of Stockers slugs to switch with the Enigmo and Stocker hits Eli with the slug and fix his vision. When they duel a second time, Burpy hits Stocker, knocking him back into one of his own cages. Eli and Burpy find their friends and start to ride home.Pronto "accidentally" leads them back to the rich couple where they ask Eli how much he wants but Eli declines since it was such hard work just trying to save him, let alone catch him. So they head back to their Mechas with Pronto still trying to convince Eli to sell the Enigmo.