The Game Boy Color had an infrared transmitter and receiver. Generation II Pokémon games made use of this feature through Mystery Gift. Super Mario Bros. Deluxe could send high scores to another cartridge.
full IR emulation for most IR-enabled games (Hudson Soft's HuC-1's IR capabilities need to be emulated for Japanese Pokémon TCG).
The Game Boy Color had an infrared transmitter and receiver. Generation II Pokémon games made use of this feature through Mystery Gift. Super Mario Bros. Deluxe could send high scores to another cartridge. full IR emulation for most IR-enabled games (Hudson Soft's HuC-1's IR capabilities need to be emulated for Japanese Pokémon TCG).