Elf: Evolve from Green Caterpillar to God-Level Rayquaza

My name is Sunan, and I traveled through time to the world of elves. But why did I become a green caterpillar! Oh, there is a system! Sleep simulator? That's okay! However, to activate the system, you need to have a trainer first? Gotta find a way! My name is Long Yubing, a former champion trainer. During the battle between Groudon and Kyogre, I fell! In this life, I want to change my destiny and save the world! First, I need a starting elf! There's a green caterpillar ahead! He said he was... Rayquaza? ? ? ? ? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.