Creating Cheats for X-Men Legends

[Viremaster]

Hello, I have been trying to make cheats for the Gamecube version of X-Man Legends for a while. Just the usual stuff - Max EXP, infinite skill and stat points, all training missions unlocked. However, due to the game being one of the less known or played titles, I could find no AR or Gecko codes to that effect. So, I used Dolphin's cheat search function, looked for values equal to the variables I wanted to max out, and found nothing. This is also peculiar as such cheats exist on the PS2 version. While I understand the Danger Room one may be more complicated as it uses more flags and such than the others, I still don't know what is keeping me from finding the other 3 values. IS just due to the programmers using some algorithm to prevent such a thing from being that easy?