Rubeus J

is a Boss Yo-kai.

In Yo-kai Watch Busters: Moon Rabbit Team and Yo-kai Watch 3, Rubeus J can be befriended, and is a Fire-attribute Rank A Rare Yo-kai of the Charming tribe.

In Yo-kai Watch: Wibble Wobble, Rubeus J is recruitable in his Boss form, which is a Rank SS Wib Wob of the Charming tribe.

Biology
Rubeus J is a towering and very powerful anthropomorphic Cat Yo-kai who bears a strong resemblance to Jibanyan, though the difference is that Rubeus J's body is brimming with muscles and built more like a humanoid. Rubeus J has a pair of long pointy ears, a long face with a small beard under the chin, thick upper cat lips and angry-looking yellow eyes. Instead of wearing a belly warmer like Jibanyan's, Rubeus J wears a golden belt equipped with numerous sticks of dynamite. He also wears a small pendant around his neck.

Rubeus J is a very violent and vicious Yo-kai, standing out as one of the most well-known evil ones, preceded only by Dame Dedtime, Kin, Gin, Bronzlow and the Wicked tribe. He showed no qualms when destroying a young boy's village and caused him to become the Yo-kai Venoct. He also showed a cocky and arrogant disposition, referring to Venoct as a "child" and even after his defeat at hands of the latter, he taunted him by describing Hardy Hound and his subordination to him.

According to Venoct, he has the power to crush "mechanical beasts" with his punches. His prowess was shown in a flashback, as he viciously raided and destroyed Venoct's home village. He can also make a large purple fireball form from his hand, as seen in his fight with Venoct.

Yo-kai Watch animation series
After his description on the previous three episodes, Rubeus J makes his formal apperance in Venoct's Revenge 4: Rubeus J. He shows in front of Venoct along with his army and engages him into combat. After a long battle, Venoct defeats Rubeus J and his subordinates. Upon defeat, Rubeus J taunts Venoct about Hardy Hound and how is he subordinated to him, along with his greater power -coincidentally, Komasan was walking over there.

Taronyan befriended him along with Hardy Hound in EP093 and they got ready to fight the Oni.

In EP112, Rubeus J, Gargaros, Hardy Hound, and Cap'n Crash went to Disrupting Class Academy but all they did is to damage the school. Mr. Crabbycat had the idea to rebuild the academy to match their size, which worked until the school got destroyed by transfer students Dromp, Gutsy Bones, and Meganyan.

In EP113, Rubeus J, Hardy Hound and Captain Thunder caught Whisper for stealing their spiked microphone and started to beat Whisper up, sending him flying out of the building when singing.

Yo-kai Watch Busters
Get the Special prize in the fight against ultra Rubeus J and Hardy Hound ("Red Cat Squad" only)

Yo-kai Watch 3
Rubeus J can be freed from the Japan Crank-a-kai with a 5-Star Coin.

Venoct
Rubeus J is the Yo-kai responsible for the destruction of Venoct's village, the deaths of his family and friends, and triggering his conversion into a Yo-kai. Since then, Venoct has a fueled desire for revenge, as revealed in the last chapter of his mini-series.

Hardy Hound
It is revealed that Rubeus J answers to the even stronger Hardy Hound. He states he himself is "nothing compared" to the dog Yo-kai.

His Subordinates
In Venoct's search for Rubeus J, he states he has several subordinates under his command, whose descriptions matched Nathan, his family, Whisper, and a number of students in his school. These unnamed subordinates include


 * An anthropomorphic hound-like entity adept on using an iron flail (his description matched Nathan's father).
 * A beautiful, violent woman (her description matched Nathan's Mother) with two sets of snakes growing out of her back. She has a penchant for slicing people in half with her Zanbatō.
 * A strategist (who matched Whisper).
 * A subordinate with no special qualities (which matched Nathan).

With the exception of the latter two, all of Rubeus J's subordinates accompanied him and engaged Venoct in battle.

Dread Knights
The Dread Knights are the foot soldiers of Rubeus J. They are said to be humans who act like savages.

Mr. Crabbycat
In EP112, Mighty Dog, Gargaros, Rubeus J and Cap'n Crash went to Disrupting Class Academy but everything they did damaged the school.

Busters/Blasters Moveset
Rubeus J-attacker

Strong against; fire

weak against; Earth

Busters Skill; Rush-user can use the attack used by the A button forever.

Moves that can be learned:

Quotes

 * Befriended (Yo-kai Watch: Wibble Wobble): "Heh Heh Heh...For me liking such a pitiful child... I'll make you suffer!"
 * Released from Crank-a-kai (Yo-kai Watch 3): "I'm out and it was a calmity. Fufufu... I'll go on a rampage...!" (我を出すとは 災難だったな. ふふふ... 暴れまわってやるぞ!)

Etymology
"Rubeus" is the Latin word for "red;" hence, "Rubeus J" translates to "Red J," essentially mimicking his Japanese name.

Origin
Red J's appearance bears a strong resemblance to Kenshiro from the Fist of the North Star franchise. Red J even made the same posture as Kenshiro usually did with intimidatingly cracking his knuckles during his introduction.

Trivia

 * Red J is notable for being one of the few Yo-kai to be defeated in an actual combat in the anime.

In Other Languages

 * Spanish: Rubio J
 * Italian: Felimonio