10 Video Game Villains That Switched Sides In The Sequel

10. Knuckles - Sonic & Knuckles

Though Knuckles the Echidna is now fondly remembered as Sonic's longtime ally, that wasn't actually the case in his debut outing in Sonic the Hedgehog 3.

Knuckles is initially tricked into teaming up with Dr. Robotnik and standing against Sonic, and as a result the two platforming icons battle each other several times throughout the game.

Though Robotnik's subterfuge is revealed to Knuckles near the end of Sonic 3, it isn't until the follow-up, Sonic & Knuckles, that he returns as a playable character, eventually joining the side of everyone's favourite video game hedgehog.

After initially proving suspicious of Sonic's motives for desiring the Chaos Emeralds, Knuckles realises they're on the same side, and the rest is history.