Well that depends. Even though they were done in 96x96, if they still fit within 80x80, it can still look good when shrunken to 64x64. But if it doesn't fit within 80x80, then it would look bad when shrunken to 64x64, the perspective would just make it look too small even though it would max the 64x64 limit. That's why in my sprite project, you'll notice that several Unova Pokemon have custom sprites, suh as Sigilyph, Scolipede, and Reshiram, since their original sprites weren't suitable for resizing.