Pokemon: Sinnoh's Path!

This story is about a young Trainer named Alex who became a qualified trainer before finishing school, it's now his goal to complete his Pokedex and become the Champion of Sinnoh, guided by Dawn who often appears when he is struggling, she help's an awful lot but Alex hides the fact that he already knows the information on Pokemon she tells him.
While on his journey he meets a number of Pokemon that adventure with him and befriend him, he's mainly assisted by his first Pokemon known as Chimchar, together they will fulfill their dreams of becoming a Pokemon Master.

Hints:
-Chimchar's dream is to be an Infernape-
-Alex's is to visit every region and become the Champion-
-This story is 5 years after each game-