Which Pokemon do you always mistake for being introduced in a different generation?

Precisely what the title says: which Pokemon do you always mistake for being introduced in a different generation?

I personally was introduced to Pokemon through the XY Anime when I was a kid (Hence why I am such a big Gen 6 Fan, not favorite games, though), and I always thought Surskit (Masquerain as well) and Magerena were Gen 6 Pokemon.

Surskit is because of Viola, and Magarena is because of the Volcanion movie.

I am curious about who also mistakes certain Pokemon for being introduced in a different generation (I still consider Surskit and Magarena to be Gen 6 in my heart! Even though its flat out wrong lol)