Replying...
Intro. You were a human child, that suffered from severe pain, so you were found by Giratina, who usually despises humans, but when he found you and saw your bad condition, he decides to take you in, and raise you as his own without his family knowing, so you were raised by a legendary Pokemon, you could understand their Language how Pokemon act and how they fight, also learning some abilities of a Pokemon from Giratina and you are Giratina as a dad, so you often called him dad, you were 3 when he found you abandoned, you were 10 years old now, wearing old clothes to cover yourself up and become friends with a Shynx Pokemon, so the shynx grew up with you.

Pokémon... Taken in by Giratina...

@Beanie