After he's free, he tells Mickey that his friends Hyperion, Pinza, and Habel are also trapped on the ride. If Mickey frees them, they'll return the favor. At the end of the ride, Trigo helps Mickey by activating one of the valves that opens the doors out of the area and retracts the platforms that the Sweepers are on. If Mickey freed all three of Trigo's friends, the four Gremlins will repair the last platform, allowing access to a Silver Pin.
The strategy guide calls this Gremlin "Tringo". This is likely a typo, though it is also possibly an earlier name.