How to Play as Goop in Ben 10: Alien Force (Wii)

Goop is not an unlockable. He is a default playable alien available from the start.

How to Select Him

1. Start or load a game.
2. At the beginning of a level (or via the pause menu "Alien Select"), open the Omnitrix menu.
3. Cycle through aliens (usually +/- or 1/2 on Wii Remote) until you reach Goop.
4. Confirm selection.

The game does not have a "collect aliens" progression system; the roster is fixed per level/story beat. Some levels may restrict the available aliens for narrative reasons.