Okay. These are facts.
Cologne did knock Shampoo in the spring. But it was pretty much done
the same way that Ranma and his father did it to each other. She had
begune to retrain Shampoo in the most dangerous training ground around
because of her failure in killing Ranma (which she believed to be a
girl who turned into into a boy in contact with hot water).
As for Mousse, He also went to train in the most dangerous training
ground around after his first defeat from Ranma. Without his
glasses. The fith step he made in Jusyenko was into a pool.

Hope that'll help.