Medabots, known in Japan as Medarot (メダロット Medarotto), is a role-playing video game franchise developed by Natsume and published by Imagineer in Japan in 1997. The video game franchise was later adapted into a Japanese anime television series produced by Bee Train. Spanning 52 episodes, the series originally aired on TV Tokyo from July 2, 1999 until June 30, 2000.
Medabot: Kuwagata Version (also available in a Kabuto Version), which started the Medabots series, is a role-playing game that Natsume developed and Imagineer released in Japan in 1997 to the Game Boy handheld gaming system on November 28, 1997. A remake of the game, Medabot: Perfect Edition, was released to the WonderSwan on May 4, 1999.
Source: Wikipedia, "Medabots", available under the CC-BY-SA License.