Wii games are on optical discs—you don't "take the game out of the Wii" like a cartridge. The disc is the game storage.
The Wii only stores save files, not game files. To "reset" a game, delete its save data via Wii Menu → Data Management → Save Data → Wii.
Important: Copying, burning, or distributing Wii discs without permission is illegal (piracy).