Weight

Not to be confused with Falling Speed.

Weight is a measure of how far a character can be knocked back horizontally by an attack, if damage is held constant. It also affects vertical knockback in concert with falling speed.

It is usually considered an advantage for a character to be heavy; however, extra weight can make characters slightly more susceptible to combos. A notable example in Melee is that characters with lower than 87 weight fall down when hit by Fox's shine, and thus are invulnerable to his shine combos.The weight class also explains the fighting style. A heavyweight usually use their strength and resistance of KO instead of having large size and being slow. Light characters, however, gets KO at very low percentages and usually have problems with KO but are small in size and quick attack speed.

SSB Weight Ranking

Super Smash Bros. Weight List
Very Heavy	Heavy	Medium	Light	Very Light
1. Donkey Kong	2.Samus 3.Link 4.Captain Falcon	5.Yoshi 6.Mario 7.Luigi	8. Fox 9. Ness	10. Kirby 11. Pikachu 12. Jigglypuff

SSBM Weight Ranking

Following are the characters in Super Smash Bros. Melee, ranked in order of heaviest to lightest. This list is based on horizontal knockback on the Mushroom Kingdom 2 weight scale and is featured on Mew2King's website of statistics. Mew2King credits Blake Mutschler and Aaron Kurtz for having calculated these data. The Metal Box multiplies a character's base weight by 3, the Super Mushroom by 8/5ths, and the Poison Mushroom by 5/8ths.

Rank	Character	Weight (NTSC)	Weight (PAL)
1	Bowser	117	118
2	Donkey Kong	114	114
3 (NTSC) 4 (PAL)	Samus	110	110
4 (NTSC) 5 (PAL)	Ganondorf	109	109
5 (NTSC) 3 (PAL)	Yoshi	108	111
6-7	C. Falcon	104	104
6-7	Link	104	104
8-10 (NTSC) 8-9 (PAL)	Dr. Mario	100	100
8-10 (NTSC) 8-9 (PAL)	Luigi	100	100
8-10 (NTSC) 10 (PAL)	Mario	100	98
11	Ness	94	94
12-14	Peach	90	90
12-14	Sheik	90	90
12-14	Zelda	90	90
15	Ice Climbers	88	88
16 (NTSC) 16-19 (PAL)	Marth	87	85
17-19 (NTSC) 16-19 (PAL)	Mewtwo	85	85
17-19 (NTSC) 16-19 (PAL)	Roy	85	85
17-19 (NTSC) 16-19 (PAL)	Young Link	85	85
20-21	Falco	80	80
20-21	Pikachu	80	80
22 (NTSC) 23 (PAL)	Fox	75	73
23 (NTSC) 22 (PAL)	Kirby	70	74
24-25	Jigglypuff	60	60
24-25	Mr. Game & Watch	60	60
26	Pichu	55	55

SSBB Weight Ranking

Firstly, for the purpose of calculation of knockback, every character has two associated constants, namely Weight 1 and Weight 2. Here is the order of characters' weights in Brawl. These weights were calculated by MrSilver. and ColinJF.

Rank	Character	Weight 1
1	Bowser	1.111
2	Donkey Kong	1.096
3	Snake	1.076
4	King Dedede	1.071
5	Charizard	1.061
6	Ganondorf	1.056
7	Samus	1.051
8-9	Wario	1.045
8-9	Yoshi	1.045
10	R.O.B.	1.040
11	Ike	1.035
12-13	Captain Falcon	1.030
12-13	Link	1.030
14	Wolf	1.020
15-16	Ivysaur	1.010
15-16	Lucario	1.010
17	Mario	1.000
18	Luigi	0.995
19	Sonic	0.985
20-22	Lucas	0.980
20-22	Ness	0.980
20-22	Pit	0.980
23	Diddy Kong	0.975
24-25	Ice Climbers	0.970
24-25	Toon Link	0.970
26	Peach	0.960
27	Marth	0.944
28-29	Sheik	0.935
28-29	Zelda	0.935
30-31	Falco	0.919
30-31	Olimar	0.919
32	Zero Suit Samus	0.914
33	Fox	0.910
34-35	Meta Knight	0.904
34-35	Pikachu	0.904
36	Kirby	0.899
37-38	Mr. Game & Watch	0.884
37-38	Squirtle	0.884
39	Jigglypuff	0.849

Rank	Character	Weight 2
1	Fox	3.41
2	Sheik	2.21
3	Wolf	1.84
4	Falco	1.23
5	Squirtle	1.05
6	Captain Falcon	0.92
7-8	Ganondorf	0.91
7-8	Bowser	0.91
9	Meta Knight	0.68
10	Diddy Kong	0.55
11	Lucas	0.49
12	Link	0.46
13	Zero Suit Samus	0.44
14	Pikachu	0.40
15-16	Sonic	0.33
15-16	Charizard	0.33
17	Wario	0.30
18	King Dedede	0.29
19	Ike	0.28
20	Donkey Kong	0.20
21	Snake	0.16
22	Ice Climbers	0.07
23	Mr. Game & Watch	0.01
24-25	Mario	0
24-25	Pit	0.000
26	Yoshi	-0.05
27	Ness	-0.12
28-29	Ivysaur	-0.16
28-29	Toon Link	-0.16
30	Marth	-0.25
31	Zelda	-0.26
32-33	R.O.B.	-0.32
32-33	Luigi	-0.32
34	Peach	-0.37
35	Lucario	-0.40
36	Kirby	-0.44
37	Olimar	-0.47
38	Samus	-0.54
39	Jigglypuff	-0.78

References

• [1]
• Brawl weight list and falling speed calculations