https://www.polygon.com/2018/11/1/18050390/waluigi-super-smash-bros-ultimate-roster

Today’s Super Smash Bros. Direct quickly answered the question of whether Waluigi would finally be a playable fighter in the game: No.

The bad news came six minutes, 22 seconds into the broadcast. “That’s all the fighters you’ll find in the game,” director Masahiro Sakurai said gravely, after introducing Street Fighter’s Ken and the Pokémon Incineroar as the 73rd and 74th characters of the now-complete roster.