Saberdon: Based on
Smilodon Fatalis
Description: Looks similar to a "normal" smilodon, but with claws and fangs resembling carved stone weapons, similar to Clovis Points and other stone age weaponry.
Type: Rock
Ability: Tapered Edge (Contact moves lower enemy defense)
80/120/70/50/70/100 (490 total).
By design, it is meant to be frightening in that it can force a switch and make opponents think twice about what comes in on it. However, being pure rock leaves it weak to common priority moves which in turn can force a retreat thanks to meager defenses.
(Unnamed Sloth): Based on
Megatherium
Description: A large, sloth-like pokemon with a layer of thick fur and moss covering the majority of it's back. It has large forearms and impressive claws, but a gentle disposition.
Type: Rock/Grass
Ability: Fur Coat
120/110/70/80/80/30 (490 total)
By design, the sloth is meant to be a fearsome physical wall. However, it's typing leaves it with only 2 resistances and 4 weaknesses to common (and now relevant steel) type attacks. It's low speed and restricted access to recovery / status moves can make it susceptible to things whittling it down / status against it. While it's offensive stats are usable as well, it won't have that much coverage overall.