There were no 128 MB n64 games. In fact, I don't believe there were any 64MB n64 games.
Mario 64 was 64 Megabits... or 8 Megabytes, and the Zelda titles weighed in at something like 4x that... or about 32 MB... Resident Evil 2... that was a large game, too. That may have actually been 64MB.
Bits. Bytes. Meh.