The following are known Action Replay Codes for Who Wants to Beat Up a Millionaire 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

Infinite Ask the Audience
80072094 0000

Infinite Phone a Friend
80072090 0000

Infinite 50:50
8007208C 0000