So for Animal Crossing did you just add up their hand held and home console sales and divide?
Animal Crossing (GC) - 3.15m
City Folk (Wii) - 4.43m
Wild World (DS) - 11.83m
New Leaf (3DS) - over 3m (Japan only, VGC is behind due to not tracking digital sales)
So I would say hand held versions of Animal Crossing are S-tier while home console versions are B-tier.