So I was wondering, it's never mentioned anywhere so I'm guessing
the answer is no, but does the pokeradar increase the chance of
mega pokemon hatching?
Nope it does not. The only things to increase mega-able hatching
are the Mega Cuff (available for 225 Nuggets for 30 days in the
Special tab of the Item Shop) and having the mega-able bonus from
the Fountain.
U can also increase ur mega-able chance by having the mega bracelet
(can be obtained after completing ur fourth badge set), and by
having higher IV mon in daycare.
Though not always available, u can also increase ur mega-able
chance thru one of the fun fair games.