

The Wii edition of the game is created by Beenox and supports up to four players in a split-screen offline multiplayer setup. Online play accommodates a maximum of four participants across four available modes: Conflict, Rush, Team Conflict, and Team Rush. Each mode has its own unique rating within Mario Kart Wii's scoring system. The Wii version also incorporates Friend Codes, enabling players to host games exclusively with their friends. Online interactions feature Miis in a way similar to how they're used in Mario Kart Wii.
| Wii | October 31, 2008 |
| Audio | Subtitles | Interface | |
|---|---|---|---|
| English (US) | ✓ | ||
| 日本語 | ✓ |