This is not a guide in a way, more like a resource, however I cannot just enter plain text under there so I had to settle with putting this under guides.

This cheat code is useful not only if you wanna unlock every player from the legendary teams for speedruns, it's also useful for unlocking literally everything if you don't feel like grinding points. This should work on all versions, although I've only ever tested this out on PS2.

The code is rather simple actually, just go into create a player and make a new player and name it "Katie Roy." For speedruns, doing this may seem like it's violating the rules of using "default rosters", but as long as you don't change any of the players and you don't use the newly made player, you're good. You can also save your profile after making the player then reset back to default which is what we prefer. It will still keep the teams and everything else.