Rathalos

A Rathalos is a type of flying, from the  series of games produced by Capcom. A Rathalos appears in Super Smash Bros. Ultimate, both as an Assist Trophy and as a boss in both Classic Mode and the World of Light, the first to appear as both. It is one of the few third-party Assist Trophies without any playable fighters from their home series, with the others being Akira, Bomberman, and Shovel Knight.

As an Assist Trophy, he can strike the opponent with his claws or breathe fire onto the stage. When he roars, nearby fighters may be stunned. In the boss fight for Rathalos, the player fights him on a flat plains stage resembling the Ancestral Steppe from the Monster Hunter series. He is fought in the final round in the Classic Mode routes for Yoshi, Marth, Duck Hunt, and Piranha Plant. He is also fought in the Classic Mode route for Bowser and Hero, albeit before the final round (with Mario and Metal Mario for the final battle for Bowser, and with Robin and a giant Charizard for the final battle for Hero).

In addition, Super Smash Bros. for Nintendo 3DS / Wii U features a downloadable outfit and headgear based on the Rathalos for the Mii Fighter. The outfit is titled Rathalos Mail, and the headgear is called Rathalos Helm. It was released for Wave 4 of the Mii costumes DLC.