Keitai Kaitsuu Tamagotchi Plus
Released November 2004
The Keitei Kaitsuu Tamagotchi Plus (or K-Tama) was a Japanese-exclusive unit that was the followup to the original Tamagotchi Plus. While the English Connection V3 was based on the K-Tama physically, the K-Tama had numerous unique features, namely the ability to interact with cell phones. Special "akai" units were released that have red pixels.
The K-Tama had two licensed releases: Hanerutchi based on the comedy show Haneru no Tobiru, and Oden-Kun based on the anime of the same name. Oden-Kun lacks the antenna of other K-Tamas, but its programming is nearly identical.