I’ve always wondered how Pokémon like Togepi and Marill are Gen 2 Pokémon despite being introduced in the first 2 og series of Gen 1 especially how Ho-Oh is also a gen 2 Pokémon but was first seen in the first episode of the first season in Gen 1 and I still don’t know how the same is how Zorua and Zoroark were introduced in movies part of Gen 4 but are considered gen five and Pokémon and another is how Sylveon was introduced in a Pikachu short part of gen 5 but is considered a gen 6 Pokémon so if you know why then please tell me in the replies