Keitai Denju Telefang: Power Version

Keitai Denjū Telefang (Japanese: 携帯電獣テレファング, Hepburn: Keitai Denjū Terefangu; lit. "Mobile Phone Beast Telefang") is a series of role-playing video games (RPGs) developed by Natsume Co., Ltd. and published by Smilesoft. In the games, the player contacts various creatures using a mobile phone-like device in order to get them to battle the foes they will encounter. Released exclusively in Japan on November 3, 2000 for the Game Boy Color, it came in two versions: Power Version (パワーバージョン, Pawā Bājon) and Speed Version (スピードバージョン, Supīdo Bājon). Each version features several exclusive creatures.