I'm looking for manga that have characters that start out with decent specs, but degrade over time.

Maybe an attractive guy who is a real ladies' man at first, but then he becomes fat & bald.
Or the daughter of a very rich family, but then she becomes very poor later on.
Or a shounen/action antagonist who was a major villain, but becomes a gag character or a joke rival after several chapters.
Or a really smart character who fails his/her university entrance exams.

If I've made a thread in the "I'm Looking For..." forum, I am only interested in Japanese manga. I am not interested in non-Japanese media at this time.