Somehow, I chose Omastar, because I was just following my gut feeling.
Anyway, at least they have admirable characteristics. Omastar is a great Special Attack and can place Spikes for the opponents, Kabutops is a great physical attacker and can use his awesome Aqua Jet when needed, and Aerodactyl is very fast and can taunt his foes into not setting up.
Kabutops is my favorite Pokemon (tied with Mew)! So you can imagine which I would choose. Those scythes, that sleek design, and the most awesome of potential move sets! An all-around fantastic Pokemon!