CheatCodes.com has all the official MLB Slugfest 2004 GBA cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Saturday May 25, 2013 for MLB Slugfest 2004 are shown below. We also have this game on PlayStation 2, Xbox, Game Boy Advance, GameCube, and sometimes tricks from other game systems will also work on Game Boy Advance.
The code is 1-1-1 down, but sometimes it works with left. This is were you cannot hit anybody.
Press B, A, and R to enter the following codes on the match-up screen. The numbers in the following list indicate the number of times each button is pressed. After the first part of the code has been entered, press the D-pad in the indicated direction to enable it. Example, to enter 1-2-3 Right, press B, A(2), R(3), Right. A message will appear to confirm correct code entry.
Effect Code All fielders run 1-3-2 Up Fireworks 1-4-1 Right 1920 mode 2-4-2 Up Ghost fielders 3-1-3 Down Skull ball 3-2-3 Left Nuke ball 3-4-3 Up Backwards fielders 4-4-4 Right
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