Yes, they ARE called Shampoo, Mousse and Cologne in the Japanese
version ... it's a tripple pun on their names. Shampoo, Mousse and
Cologne as in the English words for bathroom products. They are
also Chinese sounds (Xan Pu? Mu zu? Something like that, but I
can't remember because I don't have the faintest idea about Chinese)
... and they also mean something, the kanji of their names. Go look
at the Who's Who page or something...

"Mousse" is "Mousse" in English and Japanese.  And "Colonge" is 
"Colonge".  There names aren't spelled with Kanji, they are spelt with 
Katakana.

I don't beg to differ. Go look at their enterances. Their names are spelled
with kanji. After this, they are spelled with katakana.

Kun-chan... who is always right. :p