Same Game (Game Boy)
Same Game, different size.
Placeholder Border CHR
Placeholder tiles exist for the first CHR set for the first border. These boxes filled with X's might have been used to tell the developers where to map the border when sending it to the SNES's VRAM. Game Genie codes 468-75F-F71 + 578-76F-D53 will load the border along with the placeholder CHR. Additional code 028-86F-E6E will tell the game to keep the rendered border upon selecting Tume Game. The mockup image shows the placeholder tiles in the second border.
Border Selection Routine
An unfinished routine exists which was intended to load either selected border by setting the ID using RAM address C006 and either border ID of 01 (Same Game) 02 (Tume Game) or to 00 to nullify loading a border. Instead, the code will only keep the border when transitioning to the next, for whichever border ID is set. This function either did not work out the way it was intended and they didn't have time to finish or there was no need to complete the code.
Game Genie code will set the unfinished border identifier 028-51F-E6E and will keep the Tume Game border upon exiting to the main menu; likewise the code 028-86F-E6E will prevent the Same Game border from loading when selecting Tume Game.