While in a match with J.R. and King announcing, do Cristy Hemme's first finisher (Low Blow 5). J.R. and King will say that she did a DDT instead. Note: This was done in the PAL version of the game.
When you choose to fight in Wrestlemania IX, Michael Cole says
welcome to Phoenix, Arizona, but it actually took place in Las Vegas, Nevada.
If you choose to fight John Cena in your first match in the Smackdown storyline, Michael Cole will say RVD, though the subtitles will say John Cena.
You're able to play as Vince McMahon as a guest refeere even though he's not an actual playable character, this only works once since you won't be able to play as him again.