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|First appearance||Keroro Land Volume 31|
|Species / Type||Keronian|
Rububu (ルブブ) is character from Keroro Land. He is a Rubik's cube-like Keronian.
A unique Keronian designed after a Rubik's cube. He has said object as a head and he has four faces.
Rububu's name comes from the word, Rubik's cube.