Kaibutsu-kun and his companions, Dracula, Wolfman, and Franken, travel from Kaibutsu Land to the Human Realm, where they encounter and battle several monsters, mainly assassins from the demon group Demonish.
Source: MyAnimeList
Other anime produced by Shin-Ei Animation.
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Yukai Tsuukai Kaibutsu-kun (ユカイ ツーカイ 怪物くん)
Oretacha Kaibutsu Sanningumi yo (おれたちゃ怪物三人組よ)
Other anime that aired alongside Kaibutsu-kun (1980).
