i have a question in Pokemon platinum. can a humanshape group and a dragon group breed together?
A Pokemon that is only in the Human-like Egg Group cannot breed with a Pokemon that is only in the Dragon Egg Group, but a Pokemon that is part of both of these egg groups would be able to breed with Pokemon of the Human-like and Dragon Egg Group. Unfortunately, such a Pokemon does not exist.
Hope I helped. :) Source: http://bulbapedia.bulbagarden.net/wiki/Human-Like_(Egg_Group)