>>37753555>TriceratopsPerfect for Shield, though Shieldon and Bastiodon kind of fill the niche. We likely won't see our favorite horny dinosaurs any time soon.
>StegosaurusCould be a fun one. Make it capable of using Solar Beam by charging through its dorsal plates.
>VelociraptorAssuming you mean the incorrect kind, a Rock/Fighting type that runs fast as fuck would be great. Assuming you mean murderchicken, a Rock/Flying that doesn't actually fly would be really unique.
>MammothSadly we have Mamoswine. That's our mammoth pokemon.
>Sabertooth TigerHonestly would be better as a normal pokemon, not a fossil. Sure, there's no sabertooth tigers alive now, but they feel more like a normal pokemon than a fossil one.
>PlesiosaurLapras kind of fills this niche.
>Prehistoric MonkeyHonestly, this would suck. They'd look like shrews and squirrels, not the lovable critters we know today.
>RatThis could be a really fucking cool Rock/Water pokemon. Base it off of Indohyus, then evolve it into a Protocetus or other Basilosaurid cetacean.