According to the notification available at: https://dme.mponline.gov.in/Quick%20Links/DMECounselling_Public/DMEUG/2020/Revised%20time%20schedule%20NEET%20UG%202020%2012.11.2020.pdf, fresh registrations for Mop Up round for MP will start from December 12th December 17th. The registration fees across all Categories is Rs.1000. It is the same for General Category and Reserved Categories and for Round 1, Round 2 and the Mop up Rounds. For step wise procedure, please red our article: https://medicine.careers360.com/articles/mp-mbbs-counselling#MP-NEET-2020-Counselling

Hello. As per my research, registration fees for mop up round all over India which includes MP as well,  for unreserved category is 1000 rs.

And for other categories the registration fees for mop up round is 500 rs.

Hope that helps!