What Pokemon can breed in Pokemon Diamond?

Answer 1

Almost Pokemon can breed in Pokemon Diamond. Only some genderless and Legendary Pokemon can't breed. Some genderless Pokemon can, however, like rotom, if placed with a ditto. Pokemon are sorted into many breeding groups, such as Mineral, Human shape and Flying breeding groups. Pokemon have to be in the same category in order to breed. There is man which stands around the gate of the breeding grounds which makes comments on how your two Pokemon are doing. If he says something like "The two prefer to play with other Pokemon than each other", the two Pokemon who put in the breeding grounds will never mate. Unless you use an AR or something of the like on your game. There is also a lovely little Pokemon called Ditto which can make copies of any other non-legendary Pokemon if you breed it. Nice eh? With a ditto, all Pokemon breed, even if unliking each other.