As long as they belong to the same egg group, who are we to stand in the way of their love?
Based on a 2ch thread:
“I put Mami-san and my Dragonite into the Pokemon Day Care, but nothing has happened...” (マミさんとカイリューを育て屋に預けたのに何も起こらなかった)
DataLog: http://www.logsoku.com/r/news4vip/1347854870/