This pic makes me imagine that Fiddle is haunting the forest around Bundle City, attacking any unfortunate Yordle that enters it at night. In this case Lulu going out at night only to be haunted by the Harbinger of Death himself.
You just have to buy the right items to boost his AP. ;u; I strongly recommend; Zhonya's Hourglass, Rabaddon's Deathcap, Abyssal Scepter, Rylai's Scepter. Also balance your offense& defense for him and he'll be invincible. ;v; Don't forget health potions if you're running away from getting ganked.