Latios

Latios is a Legendary Pokemon that appeared in The Legends Before Time. With his younger sister Latias, they are known as the "Eon Duo". It was once implied that they had parents that died before Latias became a fully grown Pokemon, leaving her older brother to look after her. However, the great cataclysmic event that befell many statuses took his sister's life, but a possibility suggests that he may have survived it, although it is unknown at the moment.