Keroro, Okutokyo's Ice Age, Arisa appears

A snow monster attacks Oku Tokyo and Alisa returns hunting it.

Nebula's backstory story is revealed only in this episode in the anime rather than in his introduction unlike in the manga.

Episode Number: 
Japanese Airdate: 
Mixed Canon/Filler
Manga Chapters: 
Although there are some differences Nebula's backstory is based on chapter 99 of the manga.

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