The exclusive Japanese production run for "FireRed" and "LeafGreen" was limited to half a million copies, despite the success of "Pokémon Ruby" and "Sapphire". "IGN" speculated that Nintendo was expecting less demand for the new games, or that it was limited by the production of the bundled wireless adapter. The North American versions of "FireRed" and "LeafGreen" were indirectly announced at DICE in 2004. Although the original games were released as "Red" and "Blue" in North America, the remakes retained the Japanese names of "Red" and "Green". Masuda noted this as a choice on his part, stating the leaf represented a peaceful icon, in contrast to the alternative of water which he saw as suggesting conflict with the icon of fire used by the other game.