Ok First Glitch is in multiplayer
1.(Must have beaten all stories and have all unlockables.)
2. Choose Sonic vs. Silver
3. Choose wave ocean
4. Run with sonic until you find a place where you can jump in the water and die.
5. Choose the Red Gem in the shoes.
6. jump in the water while holding R and don't let go until you respawn.
RESULT: You should going as sonic during the speed up mode until the level is finished.
Consequence: Sonic may become EXTREMELY hard to control.
Second Glitche
1. Beat Sonics Story and must have unlocked the gun drive Gem.
2. Go back to the fight With Silver
3. Aim the gun drive up against a building and release to get on top of it
4. Aim upwards again and let go to break the barrier.
5.When you get outside Silver may follow you around the Soleanna Town. If he doesnt, get near the broken barrier and jump until Silver grabs you and Throws you Upwards. This should send you to outer Space since there are no more barriers to block Silver's Psychocenesis.
RESULT: You can get Sent to outer space.
ADDON: If you have the thunder shield, activate it when silver throws you, it looks pretty cool.
And dont worry, If any of this was too confusing ill record the videos and upload it later

I'll add more Later

Oh cool , sounds pretty interesting , Your good at finding out glitches < <