For Aerodactyl,this a set more suitable for a lead
Aerodactyl (F) @ Focus Sash
Ability: Rock Head
EVs: 252 Atk / 4 HP / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Taunt
- Stealth Rock
- Earthquake
- Rock Slide/Stone Edge
You don't really need Agility,Aerodactyl already has sky high speed,and a Brave Nature isn't useful since it hinders his speed,Steel Wing is outclassed by Iron Head if you're determined on having a steel-type move.
As for Kabutops
Kabutops (M) @ Life Orb
EVs: 252 Atk / 4 HP / 252 Spd
Ability: Battle Armor
Jolly Nature (+Spd, -SAtk)
- Swords Dance/Rock Polish
- Stone Edge
- Aqua Jet/Waterfall
- Brick Break
Kabutops can't use Surf,he has low SpAtk and Aerial Ace is weak,a STAB unresisted Waterfall does the same damage.
For Bastiodon
Bastiodon (M) @ Leftovers
Ability: Sturdy
EVs: 252 HP / 252 SDef / 6 Def
Careful Nature (+SDef, -SAtk)
- Protect
- Toxic
- Metal Burst
- Iron Head/Body Slam/Earthquake
Your set was good,just a few changes,leftovers is a lot better as an item,and Metal Burst if you know your getting OHKO but you still have your Sturdy.
For Cradilly
Cradily (F) @ Leftovers
Ability: Storm Drain
Sassy Nature (+SDef, -Spd)
- Recover
- Giga Drain
- Toxic
- Stockpile/Ancient Power
For Omastar
Omastar (F) @ Leftovers/Life Orb
EVs: 6 HP / 252 SAtk / 252 Spd
Ability: Swift Swim
Timid Nature (+Spd, -Atk)
Role: Sweeper
- Shell Smash
- Ice Beam
- Surf
- Hidden Power Rock/Ancient Power
Timid nature is there to get ad much speed as you can get,Omastar is better in special attack,so it's better to focus on that.
As for Carracosta,Its set is good