He resembles his owner very much, being cross-eyed and all. He is a turquoise-lavender mixed kind of color, but he appears as a gray and black cat in one 1979 anime episode. In the 2005 anime he has white fur. He even has a tuft of pointed hair on his head just like Suneo's hair.
He has the same qualities as his owner; he likes to show off, and he does whatever his owner does. He seems to dislike Gian and sometimes gets hyperactive if anyone mentions his name. It is shown that he probably isn't afraid of dogs like a lot of other cats, or at least just Gian's dog, Muku. Muku is really afraid of Chiruchiru rather than Chiruchiru being afraid of Muku.
- In the Hindi dub, he was first referred to as Lucky instead of his actual name. This was changed in the later episodes and he was referred to as Chiruchiru.
- His fur colour was originally a turquoise lavender colour, but it was changed to a gray-and-black colour in one 1979 anime episode. In the 2005 anime, it is white.
- In the English dub his name is changed to Mr Boogaloo.
- Chiruchiru injured his leg once in an episode.