Anime TV de Hakken!! Tamagotchi was the first anime/cartoon made for the Tamagotchi franchise. It aired aired in Fuji TV through years of 1997-1998. A total of 27 episodes were made, however only episodes 1-9 were released on VHS. Leading the remaining 18 to become lost. Due to not much popularity, it didn't last long. Leading to it not airing much time on the channel, making recordings rare. Currently no footage of these episodes exist. Not even pictures or audio. It's also stated the VHS didn't include the theme song to the anime, but it's unknown if the series ever got an theme song.
Website with the episode titles: http://home-aki.la.coocan.jp/anime-list/tamago.htm