These figures were probably taken off of keychain molds. I say this only because a couple of these toys have holes that look like a keychain holder might have gone through them. Not only that, the figures are just the right size for keychains. 
The figures in the pic on the left are Ranma as a boy, the blonde is Ukyo Kuonji. Ukyo is supposed to be a brunette, but for some reason, she has been painted as a blonde. The middle figure is Ryogo Hibiki as a pig. He turns into a pig after he gets wet with cold water. 
The figures in the right side pic are Ranma as a girl, Genma Saotome who is Ranma's father. He turns into a panda when he gets wet with cold water. On the left is Ryogo Hibiki when he hasn't gotten wet with cold water. 

Here are some more of the same Ranma 1/2 figures only they are packaged different. These toys come on a blue card that has some nice little water drops in the background. Also, there is more artwork that is probably taken from the Ranma 1/2 series. The back of the card for these figures is just plain cardboard.