Telefang manga
Besides the video games, Kodansha also commissioned a manga series to be made for Telefang. They were were serialized in Comic Bom Bom between 2001 and 2002.
Telefang 1
The Telefang 1 manga was serialized in Comic Bom Bom from March 2000 to July 2001. It was later released in 3 volumes, which are still available secondhand from online stores such as Yahoo! Japan Auctions and Amazon Japan. It was never released in English.
Plot summary
The baseball-loving kid Shigeki finds a phone up in a tree, which briefly transports him into the world of the Denjuu. The Denjuu world is a world that is supposed to be off-limits to grade-schoolders. Bewildered, Shigeki tells his classmates about what happened but only his friend Matsukiyo believes him. They decide to test out whether the phone would really take them to the Denjuu world. After they're both transported there they meet with Crypto, the Elder and many other Denjuu, and their adventure begins.
Main characters
Humans:
Denjuu:
For a detailed list, see the list of Denjuu that appear in the Telefang manga.
Translation
While the manga was never officially released to English-speaking audiences, a fan-made translation is working on translating it. The translated chapters can be found at manga.telefang.net.
Telefang 2
The second manga was serialized in Comic Bom Bom from January to July in 2002. Unlike the manga based on Telefang 1, it was only published in Comic Bom Bom and never re-released as volumes.