Jump up and slam down to unleash a powerful Badnik-busting blast.
— Description, Sonic Dash 2: Sonic Boom
When performing Knuckle Slam, Knuckles the Echidna jumps into the air, curls into a ball and rams straight into the ground with enough to create a shockwave that damage surrounding foes.
In gameplay, the Knuckle Slam is the Special Power of Knuckles. When performing it, the move will destroy all close-up enemies surrounding Knuckles. However, it cannot destroy obstacles, like mines. To perform it in gameplay, the player must swipe down on the screen while in mid-air.