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.
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.