It wasn't until Franco's 36th birthday that anything out of the ordinary happened in his life. While eating his birthday cake at the bowling alley (where he is the assistant director), he felt a deep itch on his shin. When he bent over to scratch it, he felt a small hard hand grab him back. After several days of interacting, he found that most of his bones had the ability to take human shape and walk right out of him. After playing with his new ability for a while, he realized he could use his little partners size to his advantage.

Strength
His bones can take human form and leave his body.

Strength Source
Innate ability.