Game Boy Horror SP
From the Super Mario Wiki
The Game Boy Horror SP is an item in the game Mario & Luigi: Superstar Saga. It is given to the Mario Bros. by Professor Elvin Gadd. It is the last gift they could get from him at the Starbeans Cafe. It makes rare items appear every fight. It is an upgraded version of the Game Boy Horror from Luigi's Mansion. Its name is a dual reference to the Game Boy Advance SP, a handheld console, and the Game Boy Horror used by Luigi in Luigi's Mansion, which itself is a reference to the Game Boy Color.