How do you switch Spider-Man to the sidekick on friend or foe wii?

You can't directly switch Spider-Man to be the sidekick in Friend or Foe on the Wii. The game's mechanics are designed with a fixed protagonist and sidekick:

* The protagonist is always the character you choose at the start. This is typically a hero like Wolverine or Spider-Man.

* The sidekick is always Venom. He's a permanent companion, aiding you in combat and during puzzles.

While you can control Venom directly during some parts of the game, he remains the sidekick throughout the story. The game's structure doesn't allow for swapping roles.

Let me know if you have any other questions about the game!