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This article is about Knuckles's appearance in Super Smash Flash. For the character in other contexts, see Knuckles.
Knuckles the Echidna
in Super Smash Flash
SSF Knuckles.png
Universe Sonic
Stock icon SSF Knuckles stock icon.png
Availability Starter
Tier C (22)

Knuckles is a playable newcomer starter character in Super Smash Flash from the large Sonic roster in the game. His moveset, as well as his sprite set, comes directly from Sonic Battle for the GBA.

Knuckles is ranked 22nd, in the C tier, a huge drop from his previous 6th place ranking.


Knuckles has the ability to KO foes at 0% with his down attack if it gets spaced properly and has decent stats.

However, he only has two instant-KO attacks. Furthermore, one of them hugely extends his hurtbox, making it extremely unsafe. Due to these reasons, Knuckles cannot rely on his instant-KO moves for finishing off opponents, forcing him to play by attempting to hit the opponent multiple times. Even then, this is considerably hard for Knuckles to do, as almost all of his moves have an extremely low range. The only move with a decent range is Rock Free Fall, but it has an elevated amount of startup, making its use relatively niche.

Because of these problems, Knuckles struggles against some of the characters, putting him pretty low on the tier list.

Hard data

Knuckles' hard data
Base info
Hitstun taken 8 Number of jumps 2
Attack boost 1 Attack length 16
Attack cooldown 16 Health division 14
Horizontal speed 18
Deceleration 0.9 Attack start speed 0.5x
Acceleration 0.6 Turn around speed 19
Short hopping speed 10 Jumping speed 15
Gravity 1 Falling speed 25
Individual attack data
Neutral attack damage 4 Side attack damage 2
Down attack damage 10 Instant-KO value 6
Roll attack speed N/A Jump attack damage 2


Attack Image Description Damage
Neutral attack SSF Knuckles standard attack.png Uses Kn. Straight to throw a straight jab forwards. 4%
Side attack SSF Knuckles side attack.png Uses Double Punch, trusting both fists forwards. 2%
Down attack SSF Knuckles down attack.png Attacks with Rock Free Fall, pulling out a huge rock from the ground and immediately throws it in front of him; the rock deals damage as soon as it is pulled out from the ground even at the moment Knuckles has not thrown it yet. 10%
Up attack SSF Knuckles up attack.png Uses Knuckles Upper, swinging his fist in a large sweeping upeercut. 6%
Down aerial SSF Knuckles down aerial.png Utilizes Knuckles Chop, throwing a downward swinging chop.
Jump attack SSF Knuckles jump attack.png Uses the Spin Jump, curling into a ball as he spins in the air. 2%