Well, there's no way two boys can mate.... sorry, but the only way to get a mate is to get a visit from the matchmaker. (If you connect and try to mate with another tamagotchi that had a GIRL, then you could...)
Your just going have to meet the "Annoy" matchmaker again. Hehe Sorry but boys can not make, and why would Ban-Dai want to make a way for that... Sorry..