At a recent convention, the voice of Knuckles, Scott Dreier, reveals that Knuckles basically does swear in Sonic Heroes ... but also to make that F super silent and it took us about an hour ...

With the Master Emerald's power flowing through him, Sonic goes full Super ... boom, seemingly killing Shadow, and almost certainly killing Robotnik. The day is saved. Sonic, Tails, and Knuckles ...