Mega Alakazam got 150 base speed it says on the site.
Aerodactyl still got base 130 speed it says.
But i was battling with my Mega Alakazam 31 speed iv's, 252 speed ev's and Timid nature against a trainer his Aerodactyl with a -50% water damage berry, so not mega stone or not scarf.
Still he outspeed me. Both lvl50 since it was Super Double Battles in the house where you get BP.
No trick room or anything up either. So i was very surprised.
Either M.Alakazam his speed is set too high on the site, or Aerodactyl his speed too low.