Emulation
Revelations: The Demon Slayer (US)
For Game Boy Color - Size: 193 KB
For Game Gear - Size: 295 KB
For Game Gear - Size: 311 KB
Emulators
You need a Game Boy Color emulator to play Revelations TDS and a Game Gear emulator to play those other two Japanese titles.
Music
Memory Size: 268 KB
Length: 00:36
Memory Size: 445 KB
Length: 00:36
Memory Size: 386 KB
Length: 00:36
Memory Size: 306 KB
Length: 00:36