Pokemon: I Became an Egg from the Start

Lin Bo transmigrates into the Pokemon world as an egg, only to discover that it's a double-yolk egg. Besides Lin Bo, there's another spiritual entity inside. Team Rocket discovers them and uses them for experiments until Mewtwo goes berserk, giving them a chance to escape. While fleeing their pursuers, Lin Bo jumps off a cliff and drifts to the Donghuang Region, where a kind old man finds him.