Unknown Cheat – Barcode Taisen Bardigun (J) (SGBC)
At the Title Screen while Push Start is flashing, press Select, Select, A, A, B, B, Start.
I’m not sure what the cheat does, besides set the following two RAM addresses to 0×01:
These two GameShark codes would have the same effect of the push-button cheat:
And this one Game Genie code would have the same effect as the two GameShark codes: