Pocket Monsters: Blue/Changelog

Pokémon originally began in Japan under the name Pocket Monsters, with two video games initially released called Pocket Monsters: Green and Pocket Monsters: Red. An improved version, called Pocket Monsters: Blue, was offered via a promotion though Coro Coro magazine. This improved version had superior graphics and sound, along with a few changes to some of the maps. Most notably, Pocket Monsters: Blue had a different color pallet when played on the Game Boy Color, and in the opening cinematic, Nidorino is changed to Jigglypuff.

The following covers other changes made to Pocket Monsters: Blue that were not present in either Pocket Monsters: Green or Pocket Monsters: Red.


 * Many of the Pokémon sprites were changed, due to odd stances and proportions.
 * The map of the Cerulean Cave was changed
 * HP Up items can no longer be purchased at Poké Marts.
 * In Pocket Monsters: Red and Pocket Monsters: Green, Nidoqueen was listed in the Pokédex as weighing 6.0 kg, whereas her male counterpart, Nidoking, had an index entry of 62.0 kg. This was corrected in Pocket Monsters: Blue, where Nidoqueen weighs 60.0 kg.
 * In Pocket Monsters: Red and Pocket Monsters: Green, Losing to Sabrina in Saffron Gym makes the game think you won against her, so re-entering the Gym triggers the post-battle text, granting you TM46 (Psywave) and the Marsh Badge. This was fixed in Pocket Monsters: Blue.
 * In Pocket Monsters: Red and Pocket Monsters: Green, it's possible to surf from the "north edge" tile of a cliff. This allows the player to avoid the "current is too fast" message when in Seafoam Islands, and thus allows the player the opportunity to catch Articuno without solving the boulder puzzle. This was fixed in Pocket Monsters: Blue.
 * Four items have had their locations changed in Pocket Monsters: Blue.
 * Copycat's bedroom: The Nugget was moved from the bed to the desk. This item was also bug fixed as it was not properly detected by the Itemfinder, could be prevented from being collected, and could also be infinitely collected.
 * S.S. Anne B1F: There was an out-of-bounds Hyper Potion that could only be obtained by facing the void in the corner of one of the cabins. This item was moved to the bed instead.
 * Silph Co. 5F: The Elixir was moved from the left plant to the right plant.
 * Route 17: The Rare Candy was moved one tile up to make it harder to accidentally bump into the trainer while trying to collect this hidden item.
 * Changes were made to the screen flashes for certain moves in Pocket Monsters: Blue (such as Thunderbolt, Body Slam, or Hyper Beam), in order to reduces the amount of flashing made on-screen.