All-Star Baseball 99 (Game Boy)

The crack of the bat! The roar of the crowd!... Nevermind!

Planned Super Game Boy Support
There are two MLT_REQ with bits  and  Super Game Boy packets that are used to tell the game that it is running on a Super Game Boy via requesting input from two controllers which only the Super Game Boy can process and detect. By enabling the Super Game Boy flag located at and modifying it to, or using the Game Genie code  you can enable the long lost basic Super Game Boy commands.

DATA_SND
There are unused DATA_SND commands located at.

MASK_EN
Further, unused MASK_EN commands are found at

Dummied Super Game Boy Packets
is space for two additional Super Game Boy functions.