Teeny, along with the other trappers, was attacked one night by a mysterious dragon rider and lost numerous dragons they previously captured. Their fort was destroyed by a large ice-spitting dragon afterward, and was trapped in huge spikes of ice.
The next day, as Hiccup and Astrid were examining the fort, the trappers shot down a Stormfly while she was in the air. Hiccup and Astrid came to rescue her, and they met the Trappers. Like the others, Teeny was fascinated by Hiccup's dragon blade. Immediately, the two were assumed to be working with the other rider from the night before, though the Viking couple were quite confused about the ordeal. After Eret explains that he and the others work for Drago and need to deliver a new batch of dragons by tomorrow, the trappers tried to capture Toothless but ended up losing Stormfly, and the Vikings in the process.
Not long after, Hiccup and Astrid returned to their ship and "surrendered." Hiccup explains it was unwise to threaten the dragons and implied they could destroy the ship. Hiccup then handed No-Name his dragon blade, while explaining how it worked. When No-Name released the gas, Ug sparked it on accident, causing a small explosion. Soon the other Berk Dragon Riders showed up, taking over the ship. After listening to Stoick's encounter with Drago, the riders left and the trappers were on their way.
Later, Teeny and the other trappers watch as Eret is kidnapped by the Dragon Riders. He is not seen again for the rest of the film.
After the reform of Eret, his former leader, Teeny, along with Ug, No-Name, and the rest of Eret's Crew, appears to have reformed as well. He, along with the other crew members, came across a Night Terror covered in pine tar from a wrecked Dragon Hunter ship on Scuttleclaw Island. Teeny and the others sent a Terror Mail to Eret informing him of the situation, sending him and the player on a quest to rescue the dragon.
Later on, Eret claimed that his old crew, including Teeny, "wouldn't believe their eyes" if they saw him taking care of the three Rumblehorn Hatchlings.
Teeny is a large adult male with a long chin and small eyes. He is one of the few of Eret's Crew that has a beard. It is a bit thin and a dark-reddish blonde in color. He has no mustache.