Characters in Mario Kart DS are divided into three weight classes: Light, Medium, and Heavy. Your chosen character's weight class directly influences several key stats, affecting how your kart performs on the track.

Lightweight Characters:
- Characters: Mario, Luigi, Peach, Toad, Yoshi, Dry Bones, Daisy, Waluigi
- Pros: Excellent acceleration, quick recovery from hits, good handling and drifting. They reach top speed quickly and are nimble.
- Cons: Lower top speed, easily pushed around by heavier characters, less effective at knocking opponents off track.
- Best For: Technical tracks with many tight turns, battle mode, or players who prioritize acceleration and handling over raw speed.
Mediumweight Characters:
- Characters: Mario, Luigi, Peach, Yoshi (these characters can also be light or heavy depending on kart choice, but their base stats are often balanced)
- Pros: Balanced stats across the board. Good all-rounders, suitable for most tracks and playstyles.
- Cons: Don't excel in any single area, can be outclassed by specialists in specific situations.
- Best For: Players who want a versatile character without extreme strengths or weaknesses.
Heavyweight Characters:
- Characters: Donkey Kong, Wario, Bowser, R.O.B.
- Pros: High top speed, strong impact (can push lighter characters around), less affected by off-road terrain (to a degree).
- Cons: Slower acceleration, wider turning radius, more difficult to recover from hits or falls.
- Best For: Tracks with long straightaways, players who prioritize top speed and don't mind sacrificing some handling.
Experiment with different weight classes to find what suits your driving style best. A lightweight character might be easier to learn with, while heavyweights offer a higher skill ceiling for advanced players.