Pokemon Diamond Version (Bootleg of Keitai Denjū Telefang)

The first two Keitai Denjū Telefang games received an unofficial English translation. The original games were not related to Nintendo's Pokémon series, but the translations were marketed as Pokémon Diamond and Pokémon Jade. The creatures used for the cover arts are neither Denjuu nor Pokémon; the box for Pokémon Jade depicts a modified design of the forest spirit from Princess Mononoke, while the box for Pokémon Diamond depicts a blue snake-like creature of unknown origin. The translations are notorious for their poorly translated English text as well as serious programming errors not present in the original games that can cause the game to crash.

Source: TheGamesDB