Play Keitai Denjuu Telefang 2 : Power (English demo) Online

Keitai Denjuu Telefang 2: Power is a Game Boy Advance title from 2000, developed by Smilesoft and published by Natsume. It arrived during a period when monster-collecting games were gaining traction, but it stood apart with its unconventional approach and distinct visual style, offering something different from the more polished franchises of the era.

You control a young character who explores a world overrun with digital creatures, using an old-school mobile phone to call and befriend them. Your main goal is to build a team of these "Denjuu" and navigate through various environments, engaging in turn-based battles against wild monsters and rival trainers. Signature mechanics include the phone-based recruitment system, where you input numbers to encounter specific creatures, and the ability to fuse Denjuu to create new, more powerful allies. The pacing is deliberate, with a moderate difficulty that requires thoughtful team composition and strategy. Playing it feels like unraveling a strange, low-tech mystery where every new area holds the possibility of a bizarre new ally.