Genson! Kodai Seibutsu-shi Packy

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Genson! Kodai Seibutsu-shi Packy
(Genson! Kodai Seibutsu-shi Pakkī)
Genre Comedy, School Life
Written by Retsu
Published by Shueisha
Demographic Shōnen
Magazine Weekly Shōnen Jump
Original run 20112012
Volumes 2
Anime and Manga portal

Genson! Kodai Seibutsu-shi Packy (現存!古代生物史パッキー Genson! Kodai Seibutsu-shi Pakkī?, "Live! Ancient Creature Chronicle Packy") is a shōnen manga written and illustrated by Retsu.[1]


An elementary student named Takeru meets a very strange new friend: A Pachycephalosaurus named Packy who came from "The Lost World" where extinct animals live together. Having a passion for head-butting things, Packy has traveled to the modern world to discover the perfect head-butt target and ends up living with Takeru, his older sister, and his parents in their modern-style home. However, Packy is not the only creature to come out of the Lost World as others arrive with less friendly intentions towards humanity.


  1. Genson! Kodai Seibutsu-shi Packy at Weekly Shonen Jump official site