Sonic Chronicles: The Dark Brotherhood Cheats on DS

Characters

Complete the indicated task to unlock the corresponding character.

Cream: Get Knuckles on your team. Go to Cream at the center of the Green Hill Zone. Find Cheese in the tower to the southeast and Cream will join your team.
E-123 Omega: Complete the side quest in the northeast of Metropoplis. Ascend to the top and have Tails fly to the west. E-123 Omega will be in an underground room.

New game plus

Complete the game once.

Kron Colony: Easy completion

Defeat the first Kron you encounter. Save the game, then go south to an opening. You must fight another Kron. after you defeat him, with Amy in your team, go to the opening west from that area. Once you enter, bash the boxes with Amy's hammer. Go forward and ignore the Kron. If you get attacked by him, just flee. Go to the next room. Continue until you reach the ruler, then talk to him.

Metropolis: Sega Genesis reference

Fly to the top of the building that is at the bottom-left of the map in Metropolis. Fight (or flee from) a Seeker Drone, then continue to find a Sega Genesis. There is a controller beside the machine next to the Genesis.

Extra inventory

When you first go into space with characters that do not have full inventory for some characters(they each can have max of 3) and you leave eggman behind unequip eggman of everything ashe does not join your team until you restart the game with your upgraded characters, and his items will be useless while in space.