In GM mode, go into rosters and then into free agency. Go into the turn wrestler on/off screen. Turn your injured wrestler off and then exit. Go back in and turn him back on. (Note: You will have to wait 1 week for the wrestler to be back in the free agency and you will have to sign him again, this also means that any rivalry with the superstar will be terminated.) You can do this as many times as you like.
When in the Parking Lot Brawl, grapple your opponent and punch him so you can drag him by his hair. Take him to the WWE big rig diesel and hit O. The side of the diesel will open and you can go inside of it.
To play as Vincent K. McMahon, you must play through the general manager mode as RAW. Then during the wrestlemania PPV, McMahon will be a guest referee for one of the matches. Simply play the match and select McMahon as your character and you can play as McMahon. He does the McMahon stunner and some funny taunts. Note this doesn't make him permanetly playable, it's only a one time deal.
Unlock all pre-made movesets by using a created character to win 10 matches in Exhibition Mode. The Tough Enough trophy will be awarded upon completion.
To unlock the preset entrances, win 10 matches in exhibition with a CAW.
For the Last Man Standing match choose a manager for your opponent. During the match go and fight his manager until he or she is in a state to get laid out flat, when you do knock the manager out the Ref will start a ten count on the manager and if the count gets to ten you win and you'll see the manager lie in the ring in the after match cutscene (If you have a manager too then you won't see the other manager in the ring after the match).