Mario Kart i

For the DSi.

Characters
M = Medium Vehicle

S = Small Vehicle

L = Large Vehicle

If Shy Guy doesn’t count as a newcomer (with colors of him being playable in MKDS’ Multiplayer mode), then this is the only Mario Kart game after Super Circuit without any newcomers.

Starters

 * Mario (M)
 * Luigi (M)
 * Peach (M)
 * Yoshi (M)
 * Toad (S)
 * Koopa Troopa (S)
 * Donkey Kong (L)
 * Bowser (L)

Unlockable

 * Wario (L)
 * Waluigi (L)
 * Rosalina (L)
 * Daisy (M)
 * Toadette (S)
 * Dry Bones (S)
 * Shy Guy (S)
 * Birdo (M)

Shell Cup

 * SNES Ghost Valley 1
 * GBA Riverside Park
 * DS Figure 8 Circuit
 * Wii Luigi Circuit

Banana Cup

 * SNES Choco Island 1
 * GBA Boo Lake
 * DS Shroom Ridge
 * Wii DK Summit

Leaf Cup

 * SNES Koopa Beach 1
 * N64 Wario Stadium
 * GBA Yoshi Desert
 * GCN Mushroom City

Lightning Cup

 * SNES Ghost Valley 3
 * GBA Bowser Castle 4
 * GCN Bowser's Castle
 * DS Bowser's Castle

Spiny Cup (represented by Spiny (Blue) Shell)

 * Wii Toad's Factory
 * DS Shroom Ridge
 * GBA Snow Land
 * SNES Ghost Valley 3

Retro Tracks

 * The walls in SNES Ghost Valley 1 and SNES Ghost Valley 3 are now solid
 * Luigi Circuit removes the trick ramp due to their being no tricks in the game
 * DK Summit removes the trick ramps due to their being no tricks in the game
 * Mushroom City has less cars due to hardware limitations
 * Toad's Factory replaces the ramp off the factory with a cannon-like ramp (albeit not making the noises of characters and vehicles being launched from said ramps, similar to the N64 DK’s Jungle Parkway ramp in Mario Kart Wii)