At the Character Selection Screen, highlight a wrestler, then hold Start and press A.
Enter the ranking screen and choose any section. Return to the Main Menu to see a different background. Repeat this to see more backgrounds.
You can unlock and wrestel using Vince or Shane McMahon as per the below table:
Infinite double team moves
Knock out the ref by hitting him with a weapon twice. If done correctly, a message stating "The Referee Is Knocked Out" will appear. "Double Team" will light up in different colors. Now, you can perform an unlimited number of double teams moves.
Hold Block and repeatedly press the D-pad in all directions. Your wrestler will dodge every time your opponent punches or grapples, and an opening will eventually appear.
Stay in Royal Rumble longer
Rotate the D-pad when your wrestler is holding on to the ropes to stay in Rumble longer.