Win 100 games in GM Mode
I stink at playing so I usually do trades and I win something like 104 games just get players like David Ortiz, Randy Johnson, Billy Wagner, and Alex Rodriguez

Cheat for all of the cheatcodes
All you do is make a profile called"ima cheater"

Perfect team
Go to create a player and put all the good arttitubes to 100 and put all of them on the same team.Note:you will have to replace the other players

Major league baseball 2k5
At the profile screen make a profile named Ima Cheater and you will get all cheats.