Revealing: In "Sonic Vs Knuckles" right at the end of the episode, when Amy is telling Knuckles he should apologize, Amy has two right hands.

Continuity: In "Enter the Supersonic Hedgehog!" when Amy says, "Tails, the plane's on fire!", her eyes are blue instead of green.

Other: In "Scream Test" when Cris says, "We'll be out of camera range," Tails has his legs crosed, but his tails have disappeared.

Continuity: In "Sonic Vs Knuckles" Knuckles' eye color constantly changes from brown to blue throughout this episode.

Continuity: In "Fierce Battle! School Wars" When Sonic returns after going for a run and Amy opens the door, she has no white stripes on her boots.

Revealing: In "A Messenger from Meteoric Shower" Tails automatically knows Cosmo's name even before she introduces herself later on (Dub only).

Revealing: In "Enter the Supersonic Hedgehog!" there is a scene near the beginning when the camera is behind Tails, Knuckles, and Amy, you see that the explosion of Chaos Control engulfs the land, yet, if you look carefully, you'll see it doesn't get any closer to them, rather the ball just gets bigger.

Continuity: In "Enter the Supersonic Hedgehog!" when Amy asks "What's the matter with Knuckles?", her eyes are blue again instead of green.

Continuity: In the episode "Sonic v Knuckles" when Sonic and Knuckles run into a buds then up the cliff, Knuckles is running but when the scene cuts to him, Knuckles is climbing.

Continuity: In "The Adventures of Knuckles and Hawk" the emerald is bigger than Knuckles hand, but when the scene cuts to the emerald, it is smaller.

Continuity: In "Amy On The Beach" right when Amy picks up the broken bracelet and starts to cry, she has no shoes on but she did beforehand.

Continuity: In "Fierce Battle! School Wars" When Sonic returns after going for a run and Amy opens the door, she has no white stripes on her boots.

Plot hole: In "A Messenger from Meteoric Shower" Sonic reverts back to normal form before falling through the atmosphere. So why didn't he burn up in re-entry?

Continuity: Chris grabs the emeralds of Eggman and flees in a ship, Shadow shoots the ship down and Rouge grabs him. When Rouge flies Chris into the hole in the floor, Shadow looks down twice - once in the long shot, and again in the close-up.