Pokémon Red and Green Versions/Connectivity

Players may trade Pokémon between two cartridges or battle with another cartridge using a Game Boy Game Link Cable. To take full advantage of this feature, several Pokémon are exclusive to each game of the pair and others require trading to evolve, making trading necessary to complete the Pokédex. The games can trade and battle with Japanese versions of Pokémon Red, Green, and. They can also trade with Japanese versions of via the Time Capsule. Pokémon Red and Green are completely incompatible with games from Generation III onward.

Trades between Pokémon games in different languages are possible; however, a Japanese game cannot connect with a non-Japanese game without causing corruption. This is due to the fact that the games cannot automatically translate the Pokémon data from Japanese to a different language or vice versa, since neither game fully encodes both kana and the Latin alphabet (only encoding one fully and the other partially). If a battle between a Japanese game and a non-Japanese game is attempted, the battle simply does not work, with the save files left unharmed.

Pokémon Red and Green are compatible with, 🏴󠁧󠁢󠁥󠁮󠁧󠁿 (released as Pokémon Stadium in English), and Pokémon Stadium Gold and Silver (released as Pokémon Stadium 2 in English). While link battles are not possible directly between Pokémon Red and Green and the Generation II games, a player may challenge a Generation II game using Pokémon Stadium Gold and Silver.