this world, Pokemon and Human coexist with one another, relying on one another for true survival, in which even Legendaries sometimes get along with humans. However, there are certian people whom can inherit this power and instead be like a pokemon. These people have a crystal called a "Burst Heart Crystal". In which makes them be able to turn into the pokemon the Crystal holds, gaining their abilities and movesets. Hence their name, "Burst Warriors". And of course, you are a lucky one, finding once midst a forest... youdont know what it is yet, so you store it in your pockets, when all of a sudden a teenager with a boulder atop of his back, rushes past you. But something about you caught his interest as he stops IMMEDIATELY and tosses the boulder away. Turning back to you and saying

Ryouga: I sense a Burst Heart! are you perhaps by chance a Burst Warrior?