Meanwhile, in the really cool basement of a really boring house, Newt Scamander was taking care of the fantastic beasts to which he had dedicated his life. At the moment, he was feeding his chipodile, which was a cross between a chipmunk and a crocodile. For some reason, it ate only calzones.
"What drives you to collect these beasts?" asked Jacob, the fat Muggle who randomly lived in Newt's house.
Heroically, Newt thought it over. "I want to be the very best," he said eventually, "like no one ever was. To catch them is my real test, to train them is my cause."
"But where will you find them?" asked Jacob sidekickly.
"I will travel across the land," explained Newt as he walked over to feed his oxagroo, a cross between an ox and a kangaroo, "searching far and wide each beast to understand the power that's inside."
Jacob shrugged. "Gotta catch em' all, I guess."
Suddenly, some forgettable character entered the room. It was Newt's assistant Bunty, who it turns out is actually a young Molly Weasley. This is canon now.
"Newt, I need some help," she said. "There's this bizarre weirdo at your door."
"Oh, that's Dumbledore," explained Newt. "Let him in."