Free $50,000:
Press Shiftt + 4 while at the Bot Lab. This can only be done up to $50,000.

Get hidden parts:
You must have the first pach to do this. In the bot manger, rename your bot cheatbot, then press enter. You'll get new wheels, a switchblade and some skulls.

Thanks to Revolution readersIlya G., Fat Cat Racing 2000, and Barry!