Lord Empoleon

Birth
He was born from a union between a Lucario and an Empoleon. A relationship that was, unfortunately, very short-lived. One fateful night, not long after Piplup hatched, a trainer managed to capture both parents. Piplup managed to escape, but was traumatized. Unfortunately, Piplup was unable to simply leave the area. A group of tough pokemon controlled the area and would not let him leave. Braving the wild in hostile territory caused him to grow up very quickly.

Prinplup
As a Prinplup, he managed to gain enough strength to fend for himself. He left immediately after showing his strength to the pokemon controlling the area. He vowed to one day find the trainer that stole his parents from him. Years of searching and battling made Prinplup even stronger.

Empoleon
Empoleon became much stronger. But quickly discovered that simply fighting his way through the wilderness would not help him find his parents. Thus, he resigned himself to a life of study and exploration in hopes that one day, he'll find his parents.

Whirl Islands and Appearance on PokeTwitter
Empoleon's exploration brought him to the Whirl Islands, where he had heard a legendary pokemon resided. He knew the temptation of capturing a legendary pokemon would be too hard for a trainer to resist. Unfortunately, there were other trainers nearby content with a consolation prize. After fending off a swimming trainer, he picked up a waterproofed laptop and several pokeballs that were left behind when the swimmer fleed. The laptop was currently on a site named Twitter, with the last tweet saying "omg I'm gonna catch a shiny empoleon brb." Empoleon decided to open up an account of his own to try to get in contact with other intelligent pokemon. He was in contact with several pokemon living in Viridian City and decided to meet them.

Viridian City
Buizels and Croconaw welcomed their guest.