Traction
Traction is a measure of how far a character can slide on the ground, either by shielding an attack or by wavedashing. Melee is generally considered best for characters to have a moderately low traction, so they can wavedash an optimal distance. Luigi is known in all 3 games to have an extremely low traction.
Traction ranking
This is a ranking of each character's traction in Melee, from least to greatest.
1. Luigi
2. Ice Climbers (Except on ice, where their traction is best)
3. Mewtwo
4. Marth
5. Yoshi
6. Roy
7-9. Dr. Mario/Mario/Mr. Game & Watch (all equivalent)
10. Samus
11. Ness
12. Fox
13. Bowser
14. Falco
15. Young Link
16. Ganondorf
17. Donkey Kong
18-19. Pikachu/Sheik (equivalent)
20-21. Captain Falcon/Kirby (equivalent)
21. Pichu
23. Jiglypuff
24. Link
25-26. Peach/Zelda (equivalent)
This is a ranking of each character's traction in Brawl, from least to greatest.
1. Luigi
2. Ice Climbers (Except on ice, where their traction is best)
3-4. Yoshi/Squirtle
5. Ike
6. Lucas
7-8. Dedede/Diddy
9. Kirby
10. Captain Falcon
11. Pit
12-13. Ivysaur/Donkey Kong
14. Snake
15-16. Zelda/Toon Link
17-19. Charizard/Marth/Metaknight
20. Ness
21. Bowser
22. Samus
23. Pikachu
24-29. Mario/R.O.B./Fox/Mr. Game & Watch/Olimar/Sheik
30. Link
31. Falco
32-33. Ganondorf/Peach
34-37. Sonic/Zero Suit Samus/Wario/Wolf
38. Jiglypuff
39. Lucario