Rathalos is a Flying Wyvern from the original Monster Hunter game and one of the bosses of that game.
In Super Smash Bros. Ultimate, Rathalos can be both an Assist Trophy and a Boss in the Monster Hunter Stage in the World of Light mode.
Rathalos are large, bipedal wyverns with a spiny, armored hide covering their body. Their outer shell features much brighter and more vibrant colors than that of their female counterpart, the Rathian. It is primarily bright red, with black markings throughout. Like the Rathian, Rathalos possess a flame sac which is used to produce deadly flaming projectiles from the mouth. The talons upon their feet are highly poisonous and are known to inflict toxic mortal wounds on larger prey. In addition, their long, thick tail features a heavy spiked club at the end. Rathalos' wing membranes feature ornate patterns which are likely used to attract potential mates.
Rathalos appears as a Mid-Boss.
Rathalos is one of the bosses of the game.
Rathalos is one of the bosses from Adventure Mode: Elemental World.
Rathalos is a boss in Super Smash Bros. for the arcade. It appears as a random boss in Classic Mode. Its EX counterpart can be battled if the player reaches the final round on difficulty 9.0 or higher.
Rathalos is a boss in PlayStation All-Stars: Ultimate Battle. It appears as a random boss in Classic Mode. Its EX counterpart can be battled if the player reaches the final round on difficulty 9.0 or higher. Rathalos can also be battled in Adventure Mode (dubbed World of Spirits) and its spirit is obtained after defeating it.
Rathalos, alongside Mobile Suits Alpha & Beta (Side Arms Hyper Dyne), makes a cameo appearance in Baby Bonnie Hood's Special Attack.