Gammo

Gammo is one of the three aliens on the UFO in Jolly Roger's Lagoon. You have to activate all four generators with Ice Eggs in 20 seconds to power up the ship, allowing them to leave. They'll give you a Jiggy in turn and head to Hailfire Peaks to find their children.

In Banjo-Kazooie: Nuts & Bolts, the UFO was one of many props that made it into Banjoland. Also he can be seen in the Terrarium of Terror.

Gammo might be one of these aliens