Yes, the SMB2 transgendered dinosaur Birdo. I've been wanting Birdo in Smash for quite a while, especially since Yoshi has been around from the beginning.
Birdo debuted in the Japan-only game Doki Doki Panic, which was reformulated as the Western Super Mario Bros. 2, and since then, Birdo has been considered a Mario character. She had a major appearance in Wario's Woods (which I think needs to be a DLC stage, but that's a different conversation), and since 2000, has appeared in many Mario spin-off games, often paired with Yoshi.
So, come along and post if you want to see Birdo join the fray.
Birdo debuted in the Japan-only game Doki Doki Panic, which was reformulated as the Western Super Mario Bros. 2, and since then, Birdo has been considered a Mario character. She had a major appearance in Wario's Woods (which I think needs to be a DLC stage, but that's a different conversation), and since 2000, has appeared in many Mario spin-off games, often paired with Yoshi.
So, come along and post if you want to see Birdo join the fray.