Can Syed shia 12 Imamia marry an Aga Khani girl or not? Because Agha Khani believe that Muhammad S.A.W.W is the last prophet but they don't believe Imam Hassan a.s. and they don't have any concept of namaz, majlis, matam etc. And they also don't believe in Imam Mehdi a.s.

Please let me know with reference.

When they don’t have the concept of prayers, it means that they don’t believe in Quran, because Quran is very clear about prayers.
Not believing Quran means that Mohammad PBUH &his family is lying.