In "Pokémon Emerald," the Legendary Pokémon Jirachi can only be acquired via trade. A bonus disc included with certain copies of "Pokémon Colosseum" allows Jirachi to be transferred to either "Pokémon Ruby" or "Sapphire." From this point, Jirachi can be traded to "Pokémon Emerald." This generation of Pokémon games is the first in which the Steel/Psychic Legendary Pokémon Jirachi can be captured and used.
"Pokémon Emerald" is a third-generation Pokémon game and is considered a sibling title to "Pokémon Ruby" and "Pokémon Sapphire." It was released on May 1, 2005, and was the second highest-selling video game that year. It was also the third highest-selling game on the Game Boy Advance, only behind the paired games of "Pokémon LeafGreen/FireRed" and "Pokémon Ruby/Sapphire." As occurred with "Pokémon Crystal" from the second generation of Pokémon games and "Pokémon Yellow" from the first, "Emerald" adds many features and game revisions that were not present in earlier third-generation games. The changes range from major additions, such as the location and ability to catch certain Pokémon, to minor aesthetic tweaks. Additionally, like Jirachi, some Pokémon are initially missing from "Emerald" and must be acquired via trade from another third-generation game. These Pokémon are Surskit, Masquerain, Meditite, Medicham, Roselia, Zangoose and Lunatone.