What is the cheat code for a space criminal on Lego battles?

There is no cheat code for a space criminal in Lego Battles. The game has a very limited number of cheat codes, and none of them affect the character selection or gameplay in that way.

It's possible you're thinking of another Lego game. If you can remember any details about the game, such as the platform it was on or the characters you were playing, it might be easier to figure out the correct game and its cheat codes.

Let me know if you remember any more details and I'll try to help you out!