Type: Normal/Flying
Classification: Bird Pokémon
Height: 2.2m
Weight: 50.5kg.
Ability: No Guard
Pidgeot Mega Evolves into Mega Pidgeot. The gusts it can whip up with its tough and well-developed wings are powerful enough to smash huge trees. The minerals that go into Pidgeot's feathers change, resulting in a change in their coloration as well. Its body grows much stronger, with the greatest improvements in its wings. The longer crest on its head acts like a sensitive antenna, and improves its stability while in flight.
Upon Mega Evolving, its Sp. Atk gets a great boost. Take good advantage of its zippy Speed stat, and you can pummel opponents in no time flat. Its No Guard Ability means its attack will never miss—nor will attacks used against it. You can be sure of dealing damage even with moves that have low accuracy.
Reference and images: Serebii.net
Additional references, images, and information: pokemonrubysapphire.com