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Keitai Denjuu Telefang - Speed Version (Japan)

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Game Boy Color RPG 2000 Japan 1-2 Players 5 (0) 16

Keitai Denjuu Telefang - Speed Version (Japan)

Keitai Denjuu Telefang - Speed Version (Japan) - RPG Classic

Compiled by the Retro Games Online Editorial Team · Updated June 25, 2026

Keitai Denjuu Telefang - Speed Version is a Japanese-exclusive monster-collecting RPG for the Game Boy Color, originally released in 2000. It was developed by Smilesoft and published by Tomy. The game is one of two versions (Speed and Power) that feature different Denjuu availability and minor gameplay tweaks, similar to Pokémon's paired releases. Unlike many RPGs of its time, Telefang integrates a phone-based interface as a core mechanic, setting it apart from the crowd.

The player takes on the role of a young trainer exploring a world inhabited by creatures called Denjuu. You use a mobile phone device to call and befriend wild Denjuu, then enter turn-based battles to capture or strengthen them. The overworld is navigated from a top-down perspective, with random encounters triggering battles. Progression involves collecting phone numbers for Denjuu, trading with other players via link cable, and challenging trainers to earn upgrades. The game also features a day/night cycle that affects which Denjuu appear.

What makes Telefang worth a look today is its unique phone interface and the charming, colorful sprites typical of late Game Boy Color titles. It offers a genuine alternative to the Pokémon formula, with its own creature designs and battle system. Because it was never localized, playing it requires either a Japanese cartridge or emulation, but fan translations exist for those who want to understand the story. It's a niche but rewarding title for collectors and retro RPG fans curious about Japan's creature-collecting scene.

How to Play Keitai Denjuu Telefang - Speed Version (Japan) Online

To begin playing, start a new game by selecting the first option on the title screen (the one without a question mark). You'll be prompted to choose between Speed and Power versions - this is Speed, so the differences are minor (which Denjuu appear). The game is entirely in Japanese, so memorizing menu layouts helps. The main menu shows options like "Walk," "Phone," "Status," and "Save." Use the D-Pad to navigate and confirm with X.

The core loop is straightforward: walk through grassy areas to trigger random encounters. When a wild Denjuu appears, you can use the Phone option to call it - if it answers, you can attempt to befriend it. Battles are turn-based; you choose actions from menus (Fight, Call, Bag, Flee). Catching Denjuu adds their phone number to your list, letting you call them into battle later. Visit towns to heal at a center (look for a building with a red cross) and buy items like phones or healing herbs.

Progress is gated by collecting phone numbers and defeating gym-like leaders. If you get stuck, try using the phone on everything - some Denjuu require calling them from specific locations. Since menus are in Japanese, you can use a guide or a fan translation patch to navigate. Save often using the Save option in the menu; the game has a battery-backed save feature.

Keitai Denjuu Telefang - Speed Version (Japan) Keyboard Controls

Controls

Arrow Keys: D-Pad / Movement
X: A button (jump / confirm)
S: B button (run / attack / cancel)
Enter: Start / Pause
V: Select

Frequently Asked Questions

Is Keitai Denjuu Telefang - Speed Version considered easy to pick up or challenging?

It is moderately accessible for players familiar with monster-collecting RPGs, though the Japanese menus add a barrier. Battles and progression are balanced well, with some tough boss fights that require grinding or strategic Denjuu type matching. Overall, it's not overly punishing but expects you to learn its systems.

In what year was Keitai Denjuu Telefang - Speed Version originally released?

The game originally came out in 2000, exclusively in Japan. This was near the end of the Game Boy Color's lifespan, sharing the market with the Game Boy Advance.

Is Keitai Denjuu Telefang - Speed Version an official release, a fan hack, a prototype, or another kind of build?

It is an official commercial release from Tomy and Smilesoft, part of a two-version pairing (Speed and Power). It is not a hack, fan game, or prototype, though fan translations exist to make it playable for non-Japanese speakers.