Latias

Latias is a fictional creature in the Pokémon media franchise.

Creature description
Latias was introduced in the 3rd Generation of Pokémon media as one of a pair of twin dragon-like birds that can turn invisible by reflecting light using the down on their fur, the other being Latios. Latias are always female and Latios are always male, and Latias are distinguishable for its red body and more innocent complexion. Like Raikou, Entei, and Suicune from the 2nd Generation and Mesprit and Cresselia from the 4th Generation, Latias is a "wandering" Legendary Pokémon; one individual Latias roams the game world, and your encountering it in a particular area occurs completely my chance, and if you want to try to catch it you must encounter it and weaken it repeatedly and try to catch it multiple times, since it will always run away the first chance it gets.

Latias and Latios featured in the fifth Pokémon movie, Pokémon Heroes. In the Pokémon RPGs, Latias is more defensively oriented, but if given a unique item called the Soul Dew, Latias becomes a powerful battling force nonetheless. It has a unique Psychic-type attack named Mist Ball.

As a Poké Ball Pokémon
When summoned, Latias dissapears off to the side. Then for a period of time, like a red bullet it will zoom back and forth across the screen, doing damage and knockback to who it makes contact with.