Angewomon's Mega Divivolution is Ophanimon, but I do not believe that Nefertimon has a Mega Digivo because she was established as Gatomon's Armor Digivolution... I'll have to look.
Oh, guys, since we all go to school together, should we be sorting out previous relationships or are we just gonna play that all by ear? XD
I've also found the DMA DigiDex is useful too. CLICK ME!!