The following are known Action Replay Codes for Pokemon Blue Version on Nintendo Game Boy / Color (GB / GBC). These codes were also known as GameShark Codes and in most cases will work on both devices.

Device Compatibility: Action Replay & GameShark

Infinite Energy
01ff16d0

Infinite First Item
01631fd3

Infinite First Spell
01282dd0

Infinite Fourth Item
016325d3

Infinite Fourth Spell
012830d0

Infinite Money
019947d3
019948d3
019949d3

Infinite Second Item
016321d3

Infinite Second Spell
01282ed0

Infinite Third Spell
01282fd0

Infinite Thrid Item
016323d3

No Random Battles
01033cd1

Infinite PP
01282dd0
01282ed0
01282fd0
012830d0

Never Miss
01ffd6cf

Battle Any Pokemon
01XXD8CF
XX = 01 – FF