Alph, Brittany and Charlie, are tasked with saving their home planet of Koppai, due to their planet's food supplies become nearly depleted. When data collected reveals that a distant planet, given the name PNF-404 (which also happens to be the home planet of the Pikmin), is rich with a variety of fruits whose seeds can be cultivated on Koppai to end the food shortage, the crew of three travel to the alien planet in the S.S. Drake.
However, their ship malfunctions and they become separated just before landing, with the cosmic-drive key also being lost, which is mandatory for leaving the planet. Over the course of the game, Alph reunites with Brittany and Charlie, collects fruit, harvesting their seeds and using their juice for sustenance while on the planet, and eventually meets up with Louie and later on Olimar, who they rescue from the Plasm Wraith. As thanks, Olimar gives them their lost cosmic-drive key, allowing them to return to Koppai safely with their findings.
- Olimar (as Alph being an alternate skin, he has all the movesets of Olimar)