The Wii version of Tomb Raider Anniversary lacks the rolling mechanic found in other versions of the game. This was a design decision made by the developers for the Wii version, likely to simplify controls and make the game more accessible for players using the Wii Remote.
Instead of rolling, you can use the following movement options in the Wii version:
* Dodge: Pressing the A button will make Lara dodge forward, similar to a short roll.
* Jump: Using the B button to jump allows you to clear small gaps and obstacles.
While not quite the same as rolling, these alternatives provide a similar function for navigating the game's environments.