https://www.gamespot.com/articles/super-smash-bros-ultimate-brings-monster-hunters-m/1100-6461024/

A Nintendo Direct covering the upcoming Super Smash Bros. Ultimate was packed with surprises, including one for fans of the Monster Hunter franchise. The iconic monster Rathalos is joining the fray, and doing it in a way that's unprecedented for the series.

In the presentation, director Masahiro Sakurai said that Rathalos is the first character to appear as both a boss and an assist trophy. The brief footage shows the dragon breathing fire, stomping around, and generally making himself at home among the cast of Nintendo characters.