Unlocking all 32 tracks in Mario Kart Wii comes down to one thing: earning Stars in Grand Prix cups. The game features 16 Nitro tracks and 16 Retro tracks, and you'll need to conquer cups across 150cc, 100cc, and Mirror modes to access everything.
| Cups Unlocked | Tracks Added | Stars Needed |
|---|---|---|
| Mushroom, Flower, Star (Nitro) | 12 | 1 Star each cup (3 total) — available from the start |
| Shell, Banana, Leaf (Nitro) | 12 | 1 Star on each of the first 3 cups (3 Stars total) |
| Lightning, Special (Nitro) | 8 | 1 Star on all 6 Nitro cups (6 Stars total) |
| All Retro Cups (Shell, Banana, Leaf, Lightning — 16 tracks) | 16 | 1 Star on all 8 Nitro cups (8 Stars total) |
Bottom line: You need 8 Stars total — one Star on each of the 8 Nitro cups — to unlock every track in the game.
Mirror Mode is optional — strictly for completionists chasing 16 Stars.