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. Its No Guard Ability ensures that all of its attack will never miss—nor will attacks used against it. When used in conjunction of its already high Speed stat, you're sure to deliver damage fast with powerful moves that have low accuracy.
Reference and images: Serebii.net
Additional references, images, and information: pokemonrubysapphire.com