Mario's Picross

Mario's Picross underwent a few aesthetically fitting changes when the game was released internationally, but didn't sell very well outside of Japan. As a result, the sequel never left Japan.

Unused Super Game Boy SOUND Command
Called during startup is a SOUND command with all four bits set to. Nintendo obviously planned to use the internal Super Game Boy sounds some point during development and for some bizarre reason they chose to can the idea even though the packet is fully programmed. Game Genie code modifies the packet and the Gameshark Codes  will play any internal Super Game Boy sound always if another command is not issued for palettes or border setup.

Development Related Text
Located at is development-related text.

Hidden Credit
Located at is development-credit text. Toshiyuki Ueno is the music composer.

Japanese Text
Japanese text remains in the US and European releases.

Regional Differences
Neither version display the Title Screen Logos using Super Game Boy OBJ_TRN and they are indeed part of the borders, possibly since more than one instance of 16x16 object transfers are required to display both pictures and this method may not have looked the way Nintendo wanted during development, or they were simply lazy.

Compared to the Japanese logo, the international logo is rather bland.