I haven't seen Sonic X in a long time and yet this was pretty fun to do :)
I know my Knuckles voice isn't the best but I tried X3

Knuckles: RockieQuickfireVA (me)

Rouge: ShadowGlambert
https://www.youtube.com/user/ShadowGlambert

Here's the original clip if you want to try out for Knuckles
https://www.youtube.com/watch?v=O8xS_GaY6tg