Mario Kart DS/Level 1

Mission 1-1
The course is a clear route through all five gates - simply pick up every mushroom and keep the acceleration held down.
 * Description: Drive through all 5 numbered gates in order!
 * Course: Figure-8 Circuit
 * Character: Mario
 * Time: 35 seconds

Mission 1-2
Stick to the path laid out by the coins, and don't stop.
 * Description: Collect all 15 coins!
 * Course: GBA Peach Circuit
 * Character: Peach
 * Time: 30 seconds

Mission 1-3
Follow the clear trail of item boxes and use each mushroom immediately.
 * Description: Destroy all 10 item boxes!
 * Course: Yoshi Falls
 * Character: Yoshi
 * Time: 45 seconds

Mission 1-4
Drive slowly to avoid missing the fish. Make sure you crash into enough item boxes, and use each star immediately.
 * Description: Get the Star and use it to hit 5 Cheep Cheeps!
 * Course: A small section of Cheep Cheep Beach
 * Character: Wario
 * Time: 40 seconds

Mission 1-5
The gates are situated around the edge of the course. Be careful not to fall off, and make sure you don't mistake the first gate for the sixth.
 * Description: Drive through all 6 numbered gates in order!
 * Course: Nintendo DS
 * Character: Toad
 * Time: 30 seconds

Mission 1-6
Use the button to reverse, and keep in mind that left and right are reversed. Stick to the right-hand wall for a *** rating.
 * Description: Drive out this mansion... backward!
 * Course: The indoor section of Luigi's Mansion
 * Character: Luigi
 * Time: 45 seconds

Mission 1-7
Stick to the simple path laid out by the coins, and don't use the mushrooms all at once.
 * Description: Collect all 20 coins!
 * Course: N64 Moo Moo Farm
 * Character: Donkey Kong
 * Time: 35 seconds

Mission 1-8
Powerslide around each and every corner - not only will they add to your total, they'll also get you round the lap faster.
 * Description: Perform 4 power-slide turbo boosts in 1 lap!
 * Course: SNES Mario Circuit
 * Character: Mario
 * Time: 45 seconds

Boss Stage
Get away from Big Bully as quickly as possible and he'll stop chasing after you. Now pick up the triple-mushroom in the item box, and when he's standing near an edge ram into him using a mushroom. When he's knocked back, use another mushroom to knock him further, and then a third mushroom should knock him off the platform into the water.
 * Description: Use Mushrooms to crash into the Big Bully and knock him off the stage!
 * Course: Water Arena (name based on surroundings)
 * Character: Yoshi
 * Time: 3 minutes