Armaldo: Good NU / RU spinner, high Def and Good Attack, good movepool. Defeated by farily common stuff, is weak to Stealth Rocks and has no reliable recovery.
Craydilly: Good SpDef sponge, reasonable movepool, instant recovery, can use Stockpile + Sandstorm to wall almost anything specially . No notable resistances except water via Storm Drain, sub-par offence and quite a few weaknesses.
Rampardos: Extremely High Attack, great movepool, can sweep through abilities with Mold Breaker. Subpar Def, bad speed, easily revenge killed, so doesn't stay very long, and single rock typing isn't very useful.
Omastar: Reasonable Defences, good attacking and speed. Excellent use of Shell Smash. Poor Defence afterwards and easily walled by kinda common stuff, and very easily revenge killed. Poor typing, poor Rock Stab choices.
Aerodactal: Excellent Speed, high offences, great movepool and coverage, and a Mega to improve these traits. Bad abilities, Defence, easily killed, kinda bad typing and takes up the mega Slot from better assets.
Kabutops: Good abilities, decent movepool, great offensive presence, good spinner. Poor Typing, defences and lack of Coverage.
Bastioidon: Great Defences, good movepool. Very hard to revenge kill. Bad typing, low speed, poor offences, synergy
Archeops:; Awesome offence presence, great movepool, great at mixed sets, quite fast. One of the worst abilities in the game, easily revenge killed, and very low Defences.
Carracosta: See Omastar, but with much more bulk and slightly better movepool, but worse attack and speed.
Auroras: Good ability, Ice is a nice attacking type, very high HP. God awful typing, bad movepool and low offensive presence.
Tytantrum:: High attack, high defence, good abilities, okay typing, okay movepool. Other stats are poor and gets outspeed and/or revenge killed easily but special sweepers, and has no instant recovery to help it.
I'll add in movesets and roles if you want me too :P.
Rampardos @ Life Orb
Ability: Mold Breaker / Sheer Force
EVs: 252 HP / 252 Atk / 4 SpD
- Head Smash / Stone Edge
- Zen Headbutt
- Fire Punch / Pursuit / Superpower
Rampardos is best for destroying powerful walls that other cannot, so focus more on instant power than other items / spreads. It can also force switches, racking up SR damage. HP is just so it survive more than one damn Head Smash, or to make it generally bulky if you use Stone Edge. Last move it just whatever you want, either for coverage, trapping or power.
Kabutops @ Life Orb
Ability: Weak Armor
EVs: 4 HP / 252 Atk / 252 Spe
- Swords Dance
- Rapid Spin
- Aqua Jet
- Stone Edge
Powerful revenge killer that gets faster every hit. Can force out switches against weaker Pokemon to give free spins, or set up to sweep.
Armaldo @ Leftovers
Ability: Battle Armor
EVs: 252 HP / 4 Atk / 252 Def
- Rapid Spin
- Stealth Rock
Powerful wall with the ability to attack. Can take decent physical hits and is able to both spin away and set up hazards as you need them.