Gargaros

Gargaros appeared in 2013 video game called Yo-Kai Watch. Gargaros (Japanese: 赤鬼 Aka Oni) is a Fire-attribute Boss Yo-kai, and the first/main boss of Terror Time. He can also sometimes be found instead of Snartle when going across the Crosswalk without pressing the button.

In Yo-kai Watch 2: Psychic Specters, Gargaros can be befriended, and is a Rank S Fire-attribute Rare Yo-kai of the Tough Tribe.

In Yo-kai Watch 4, he is a Rank S Yo-kai of the Oni tribe.

True to his name, Gargaros is a large oni with red skin, a single golden horn on his head, clawed hands and feet and curved fangs. He wears a brown loincloth with black trousers below and carries a black kanabou (iron studded club). He is ruthless and terrifying, relentlessly hunting down those who misbehave and attacking them with his club.

As a boss, Gargaros is incredibly powerful, being able to wipe out an entire party of six Yo-kai with little time offered for resistance for those who are not powerful enough to take him on. He often cannot be successfully confronted until the post game, but his defeat causes Ogralus and Orcanos, his even more powerful brothers, to appear in his stead.

His powers are the transportation of misbehaving children to a place called Terror Time, which exists in the dreams of the kids. His massive strength and small army of oni lookouts, means the only way for most kids to escape is to get to their homes in which Gargaros cannot attack them. Once the child escapes from Terror Time, they are mentally stronger.

It seems that oni are capable of entering and exiting Terror Time at will, as Sgt. Burly entered Terror Time in the anime without a problem, and Gargaros's oni minions leave once they spot any wandering person.

Gargaros is considered to be Ogralus, Gilgaros, and Orcanos' brother. He is the first terror time boss, followed by Ogralus, and then Orcanos. He is Gilgaros' brother even though Gilgaros is not in terror time and is a Legendary instead.

According to the Medallium bio of his friend form, he can knock sense back into humans with a swing of his club.