Mario Kart DS Cheats
Ghost Racers
Beat the times listed below for each circuit to unlock a development team ghost racer.
| Circuit | Time |
| Nitro Cup: Airship Fortress | 2:10:000 |
| Nitro Cup: Bowser Castle | 2:20:000 |
| Nitro Cup: Cheep Cheep Beach | 1:45:000 |
| Nitro Cup: Delfino Plaza | 1:55:000 |
| Nitro Cup: Desert Hills | 1:35:000 |
| Nitro Cup: DK Pass | 2:15:000 |
| Nitro Cup: Figure-8 Circuit | 1:38:000 |
| Nitro Cup: Luigi’s Mansion | 2:00:000 |
| Nitro Cup: Mario Circuit | 1:57:000 |
| Nitro Cup: Peach Gardens | 1:53:000 |
| Nitro Cup: Rainbow Road | 2:17:000 |
| Nitro Cup: Shroom Ridge | 2:06:000 |
| Nitro Cup: Tick-Tock Clock | 1:55:000 |
| Nitro Cup: Walugi Pinabll | 2:24:000 |
| Nitro Cup: Wario Stadium | 2:15:000 |
| Nitro Cup: Yoshi Falls | 0:58:000 |
| Retro Cup: Baby Park | 0:55:000 |
| Retro Cup: Banshee Boardwalk | 2:15:000 |
| Retro Cup: Bowser Castle 2 | 1:53:000 |
| Retro Cup: Choco Island 2 | 1:02:000 |
| Retro Cup: Choco Mountain | 2:16:000 |
| Retro Cup: Donut Plains 1 | 1:09:000 |
| Retro Cup: Frappe Snowland | 2:09:000 |
| Retro Cup: Koopa Beach 2 | 0:55:000 |
| Retro Cup: Luigi Circuit | 1:37:000 |
| Retro Cup: Mario Circuit 1 | 0:51:000 |
| Retro Cup: Moo Moo Farm | 1:18:000 |
| Retro Cup: Mushroom Bridge | 1:31:000 |
| Retro Cup: Peach Circuit | 1:13:000 |
| Retro Cup: Sky Garden | 1:45:000 |
| Retro Cup: Yoshi Circuit | 1:49:000 |