When performing Knuckles Sandwich, Sonic and Amy first both move up in front on Knuckles. Knuckles then grabs Sonic and Amy in each of his hands and starts spinning around himself while holding onto Sonic and Amy. After building up momentum, Knuckles hurls both Sonic and Amy into the opponent, delivering a brutal frontal attack. After slightly rebounding from hitting the opponent, Sonic and Amy then each deal an additional strike to the opponent simultaneously, before retreating to their team positions.
In gameplay, Knuckles Sandwich deals attack damage to a single target with two strikes. When it deals damage, Knuckles Sandwich has a chance of inflicting stun on the target. The higher the level of Knuckles Sandwich is, the more attack damage it will deal and the greater the possibility that it will inflict stun on an opponent.
When performing Knuckles Sandwich in gameplay, the player has to complete a series of real-time events by performing certain actions on the Touch Screen, in order to execute Knuckles Sandwich optimally:
The player has to touch and stay inside the outer circle that appears when it overlaps the inner circle and follow it in a small curve on the right part of the screen from the bottom of the screen to the top.
The player has to touch the inside of two circles in succession when the outer circles overlap the inner circles.
The player has to touch and stay inside the outer circle that appears when it overlaps the inner circle and follow it vertically across the middle of the screen, from the top of the screen to the bottom.
Missing or not touching these circles correctly will either result in Sonic missing a strike or the damage from the attack being reduced.
2 x 125% of Attack damage
Stun (30% chance)
2 x 150% of Attack damage
Stun (50% chance)
2 x 175% of Attack damage
Stun (80% chance)
The way Knuckles holds Sonic and Amy is similar to the Power Formation for Team Sonic from Sonic Heroes (albeit Amy is switched with Tails).