Thomas had reached the Pelt Caves where the Pelt Trader lives. But the Pelt Trader wasn't there , he was feeding the legendary creatures who were with him.
Thomas ran and smashed the Pelt Trader with all his might, making him to fall down when the Pelt Trader had been coming out of the cage and locking it back. The Legendary creatures in the cage had ran out escaping the Pelt Caves, making it dangerous for both the world and the Pelt Trader.
The Pelt Trader had no option but to join Thomas find all the legendary creatures. As, in Thomas's mind he was thinking to catch the Phoenix first, the Pelt Trader wasn't agreed to that as he wanted to catch the Mammoth f to test his own powers.
Though, both of them were going to become very hard to catch. They needed some training for becoming stronger to catch the phoenix or the mammoth.