Must be on:
00006FA7 000A
1006F5CC 0007
Infinite coins in coin case:
82002DEC 270F
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50000 coins in coin case, press [Select] 94000130 FFFB0000 62111880 00000000 B2111880 00000000 10001068 0000270F D2000000 00000000
In Pokemon Yellow, you can obtain the coin case from a man sitting at a table in the cafe in Celadon City. The purpose of the case is to hold coins for use at the Game Corner. In Pokemon Yellow, the Coin Case can hold up to 9,999 coins.
94000130 fffc0000 28919fac ac450d3 d20000000000000 Hope this helped!
well you can do it with cheats or by yourself
you buy it in the game corner with coins after you get the coin case