For players:
"You must venture to the Island of Lost Data," Snoutlet said, pointing a trotter toward a jagged, purple landmass on the horizon that looked like a corrupted file icon. "The Admin Gloom resides there. He holds the serial codes. But beware… he is guarded by the DRMbots." license key mario & luigi: brothership
If you are looking for specific progression keys or codes within the story: For players: "You must venture to the Island