The following are known Action Replay Codes for Street Fighter III: Double Impact 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

P1 Infinite Health
816B9222
000000A0

P2 can not score 'P1 Vs P2 only'
91781674
00000000

P1 Infinite Health
84CB9E28
000000A0

P1 Score Booster 'Single player mode'
D6E890FC
0000FFFF

P2 can not score 'P1 Vs P2 only'
F86985A5
00000000

P2 Score Booster 'P1 Vs P2 only'
F86985A5
0000FFFF

P2 Infinite Health
D0B090F8
000000A0

P2 Infinite Health
68137460
000000A0

Infinite Time
5E8F6474
00000064

P1 Score Booster 'P1 Vs P2 only'
BFC6260E
0000FFFF

Infinite Time
2E9F7FC6
00000064

P1 One hit KO
84CB9E28
00000001

P2 One hit KO
D0B090F8
00000001

P2 Score Booster 'P1 Vs P2 only'
91781674
0000FFFF

P1 Score Booster 'P1 Vs P2 only'
37E13764
0000FFFF

P2 One hit KO
68137460
00000001

P1 can not score 'P1 Vs P2 only'
BFC6260E
00000000

P1 Score Booster 'Single player mode'
AEA34D12
0000FFFF

P1 One hit KO
816B9222
00000001

P1 can not score 'P1 Vs P2 only'
37E13764 00000000