Latias
Category: Eon Pokémon
Type: Dragon/Psychic
Ability: Levitate
Height: 4'07"
Weight: 88.2 lbs.
Latias is attuned to the hearts and minds of people and able to understand them. It is able to completely hide itself thanks to the feathers which cover its body and are able to refract light.
Mega Latias
Category: Eon Pokémon
Type: Dragon/Psychic
Ability: Levitate
Height: 5'11"
Weight: 114.6 lbs.
Latias Mega Evolves into Mega Latias. Its body is smaller than Mega Latios's body. It is more agile and can make very sharp turns. Latias has high stats in Speed, Defense, and Special Defense, making it very durable. When it Mega Evolves, its famed defensive strength grows substantially! It can benefit you in a supportive role, such as having it use moves to aid an ally in Double Battles.
Reference and Source Image: pokemonrubysapphire.com