Pros to Aerodactyl
~Great Attack and Speed, will function as a Sweeper
~Tough Claws is a great ability
~Wide Coverage with the Fang attacks
~Lacks a truly reliable STAB move - Stone Edge (Misses ALOT), Rock Slide (90 Accuracy and only 75 power), and Fly (Gives opponent chance to switch out)
~Not very bulky (Compared to other Megas) 80/85/95
Pros to Scizor
~Physical tank with good Special Defense.
~150 Attack with access to swords dance
~Bullet punch with Technician following a swords dance is a big hit.
~Access to Roost
~Only one weakness
~50% of all types are weak to it
~4x weak to fire
~Low Speed (75)
Go with Scizor.
Bulkier, hits harder, has a boosted priority move, BETTER.