The following are known Action Replay Codes for Fighting Vipers 2 on SEGA Dreamcast (Dreamcast). These codes were also known as GameShark Codes and in most cases will work on both devices.

Device Compatibility: Action Replay & GameShark

Unlock All Characters
EC57DBE2
00010101

Inf Health P2
B0EE3945
000000D2

Inf Time
97B80B60
0000094D

One Hit Win for P1
B0EE3945
00000000

One Hit Win for P2
41521C62
00000000

Inf Health P1
41521C62
000000D2