https://gbatemp.net/threads/dsiware-downgrade.445054/It definitely does. I did a DSiWareHax downgrade last week.
Steel Diver: Sub Wars doesn't tranfer to 2# 3DS for this guy with no reason though.
Which mean if he have the same fate, he would have to buy OOT3D or ORAS plus $5 for Fieldrunners.
Well, it's up to OP now which route he wants.
Grinding on browserhax, Buy OOT3D or ORAS, or Go DSiWareHax downgrade and hope Steel Diver got transfer.