"Friction" redirects here. For aerial friction, see here.
Because Luigi has a very small amount of traction, he slides very noticeably after finishing a dash.

Traction is a measure of how long it takes for a character to stop moving from a sideways force when grounded. Characters with low traction slide farther than others after walking, dashing, wavedashing, being hit by an attack while grounded, and so on.

Having high traction affords greater ground control over a character, so high traction is generally an advantage. Characters with low traction generally require more precise movement across the ground and cannot punish attacks as effectively out of shield since they will get pushed further away from the opponent. However, there are cases where low traction is useful: low traction is necessary for a long wavedash in Super Smash Bros. Melee and a long dash pivot cancel in Brawl, and there are cases where sliding away from a shielded attack can help escape multiple hits. In Super Smash Bros., characters with lower traction get pushed further away when being attacked when in shield, which makes follow-ups and potential shield breaks harder.

Luigi is well-known for having the least traction of any character in all games except Super Smash Bros. Ultimate; this originates from his low traction in most of the Mario platformers, which balances out his higher jumping.

Traction is also affected by terrain. For instance, nearly all characters have decreased traction on slippery surfaces such as ice. However, the Ice Climbers uniquely have the reverse of this functionality: their normally low traction becomes higher on slippery surfaces.

Traction rankings

Super Smash Bros.

Rank Character Value
1-5   Link 2
1-5   Samus 2
1-5   Fox 2
1-5   Pikachu 2
1-5   Ness 2
6   Captain Falcon 1.8
7   Donkey Kong 1.7
8   Yoshi 1.6
9   Mario 1.5
10   Kirby 1.4
11   Jigglypuff 1.1
12   Luigi 0.7

Super Smash Bros. Melee

Rank Character Value
1-4   Peach 0.1
1-4   Link 0.1
1-4   Zelda 0.1
1-4   Pichu 0.1
5-6   Pikachu 0.09
5-6   Jigglypuff 0.09
7-13   Donkey Kong 0.08
7-13   Young Link 0.08
7-13   Sheik 0.08
7-13   Kirby 0.08
7-13   Fox 0.08
7-13   Falco 0.08
7-13   Captain Falcon 0.08
14   Ganondorf 0.07
15-23   Mario 0.06
15-23   Dr. Mario 0.06
15-23   Bowser 0.06
15-23   Yoshi 0.06
15-23   Samus 0.06
15-23   Ness 0.06
15-23   Marth 0.06
15-23   Roy 0.06
15-23   Mr. Game & Watch 0.06
24   Mewtwo 0.04
25   Ice Climbers 0.035
26   Luigi 0.025

Super Smash Bros. Brawl

Rank Character Value
1   Lucario 0.0736
2   Jigglypuff 0.0718
3-6   Wario 0.07
3-6   Zero Suit Samus 0.07
3-6   Wolf 0.07
3-6   Sonic 0.07
7-8   Peach 0.068
7-8   Ganondorf 0.068
9   Falco 0.065
10   Link 0.064
11-16   Mario 0.06
11-16   Sheik 0.06
11-16   Fox 0.06
11-16   Mr. Game & Watch 0.06
11-16   Olimar 0.06
11-16   R.O.B. 0.06
17   Pikachu 0.0596
18   Samus 0.0585
19   Bowser 0.0577
20-22   Meta Knight 0.055
20-22   Charizard 0.055
20-22   Marth 0.055
23   Toon Link 0.0547
24   Ness 0.0546
25   Snake 0.0542
26   Zelda 0.054
27   Ivysaur 0.0532
28   Donkey Kong 0.0529
29   Pit 0.0505
30   Captain Falcon 0.05
31   Kirby 0.0493
32-33   Diddy Kong 0.0484
32-33   King Dedede 0.0484
34   Lucas 0.045
35   Ike 0.044
36   Yoshi 0.0426
37   Squirtle 0.042
38   Ice Climbers 0.035
39   Luigi 0.022

Super Smash Bros. 4

Rank Character Value
1   Lucario 0.0736
2   Jigglypuff 0.0718
3-5   Wario 0.07
3-5   Zero Suit Samus 0.07
3-5   Little Mac 0.07
6-9   Peach 0.068
6-9   Rosalina 0.068
6-9   Ganondorf 0.068
6-9   Palutena 0.068
n/a Giga Bowser 0.067
10-11   Falco 0.065
10-11   Corrin 0.065
12-13   Link 0.064
12-13   Mii Swordfighter 0.064
14-24   Sheik 0.06
14-24   Fox 0.06
14-24   Roy 0.06
14-24   Mr. Game & Watch 0.06
14-24   Olimar 0.06
14-24   R.O.B. 0.06
14-24   Villager 0.06
14-24   Wii Fit Trainer 0.06
14-24   Sonic 0.06
14-24   Mega Man 0.06
14-24   Ryu 0.06
n/a Wario-Man 0.06
25   Pikachu 0.0596
26   Samus 0.0585
27   Bowser 0.0577
28-33   Meta Knight 0.055
28-33   Marth 0.055
28-33   Lucina 0.055
28-33   Robin 0.055
28-33   Cloud 0.055
28-33   Bayonetta 0.055
34   Toon Link 0.0547
35   Ness 0.0546
36   Zelda 0.054
37   Donkey Kong 0.0529
38-39   Pit 0.0505
38-39   Dark Pit 0.0505
40   Captain Falcon 0.05
41   Kirby 0.0493
42-43   Diddy Kong 0.0484
42-43   King Dedede 0.0484
44-52   Mario 0.045
44-52   Dr. Mario 0.045
44-52   Bowser Jr. 0.045
44-52   Greninja 0.045
44-52   Lucas 0.045
44-52   Duck Hunt 0.045
44-52   Pac-Man 0.045
44-52   Mii Brawler 0.045
44-52   Mii Gunner 0.045
53-54   Ike 0.044
53-54   Shulk 0.044
55   Yoshi 0.0426
56-57   Mewtwo 0.04
56-57   Charizard 0.04
58   Luigi 0.024

Super Smash Bros. Ultimate

In Ultimate, traction has been significantly increased across the cast, with even the lowest traction values being higher than the highest traction values in Smash 4. This allows for every character to slow down faster on the ground after moving horizontally, and most notably benefits characters with low traction (such as Luigi and Charizard), as shielded attacks now push them back a much shorter distance, and it is therefore easier for them to punish out of shield. Unlike previous games, Luigi no longer has the most slippery shoes of the cast, nor is he even in the bottom tenth; the character with the least traction is now the Mii Gunner.

Rank Character Value
1   Sonic 0.138
2-3   Dark Pit 0.135
2-3   Pit 0.135
4   Pikachu 0.132
5-8   Isabelle 0.131
5-8   Mr. Game & Watch 0.131
5-8   Ness 0.131
5-8   Villager 0.131
9   Joker 0.13
10   Corrin 0.129
11   Wii Fit Trainer 0.128
12   Falco 0.127
13   Ganondorf 0.125
14   Donkey Kong 0.123
15   Ivysaur 0.121
16   Mii Brawler 0.12
17-25   Kirby 0.116
17-25   Little Mac 0.116
17-25   Lucario 0.116
17-25   Lucas 0.116
17-25   Mewtwo 0.116
17-25   Pac-Man 0.116
17-25   Snake 0.116
17-25   Zelda 0.116
17-25   Zero Suit Samus 0.116
26   Fox 0.115
27-29   Incineroar 0.114
27-29   Lucina 0.114
27-29   Marth 0.114
30   Link 0.113
31   Ike 0.112
32-33   Daisy 0.111
32-33   Peach 0.111
34-40   Bayonetta 0.11
34-40   Charizard 0.11
34-40   Ken 0.11
34-40   Mii Swordfighter 0.11
34-40   Pichu 0.11
34-40   Ryu 0.11
34-40   Wolf 0.11
41-42   Chrom 0.107
41-42   Roy 0.107
43-47   Cloud 0.106
43-47   Dr. Mario 0.106
43-47   Palutena 0.106
43-47   Sheik 0.106
43-47   Wario 0.106
48-52   Captain Falcon 0.105
48-52   King K. Rool 0.105
48-52   R.O.B. 0.105
48-52   Robin 0.105
48-52   Young Link 0.105
53   Bowser 0.104
54-55   Inkling 0.102
54-55   Mario 0.102
56   Rosalina 0.099
57   Meta Knight 0.097
58   Luigi 0.096
59   Yoshi 0.095
60-61   Mega Man 0.094
60-61   Shulk 0.094
62-63   Diddy Kong 0.093
62-63   Olimar 0.093
64   Duck Hunt 0.09
65   Squirtle 0.088
66-67   Greninja 0.087
66-67   Jigglypuff 0.087
68   Toon Link 0.086
69-72   Bowser Jr. 0.085
69-72   King Dedede 0.085
69-72   Richter 0.085
69-72   Simon 0.085
73-74   Dark Samus 0.082
73-74   Samus 0.082
75   Ridley 0.08
76   Ice Climbers 0.077
77   Mii Gunner 0.076