In Pokken Tournament DX, one of the things that you will get to be doing is to dress up your Avatar as you unlock costumes by clearing stages or meeting certain conditions in-game. Well, aside from those costumes that you get from simply playing the game, there are secret ones that you can get by simply entering a code.
1. On the Ferrum Region map screen, press X to enter the System Menu
2. Select the Special Code option
3. Then enter the following codes:
Old Leather Jacket Set (Female)— NQLMEMRGX37X
Old Leather Jacket Set (Male)— 6GSSALLDM9RL
Pokémon T Shirts (Female)- J7XEEQLYNDMT
Pokémon T Shirts (Male)- TC2JY22VBQUU