I see, what he wants is to challenge me with different Pokémon without having the same ones, but anyway I did not plan to capture one, I have other thoughts for a plant-type Pokémon and Serperior does not enter my plans.
For Jhoto starter I would say Totodile and for Sinnoh as you have specified the egg has not hatched for a few months it could be a Riolu whose Aura resonates with the Sion