Fearsome Four of the Dark Dueling World

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Fearsome Four of the Dark Dueling World
Fearsome Four of the Dark Dueling World
Other namesFearsome Four of the Dark Dueling World
Japanese name
Japanese闇デュエル界 四悪人
RōmajiYami Dyueru-kai Shiakunin
Anime debutYu-Gi-Oh! ZEXAL episode 112112: "Memory Thief: Part 1"
Appears in
AnimeYu-Gi-Oh! ZEXAL
World, Fearsome Four of the Dark Dueling

The Fearsome Four of the Dark Dueling World are a group of Barians led by Mr. Heartland under Vector and Don Thousand in order to steal the Number cards from Yuma Tsukumo, Shark, and Kite Tenjo.[1]


The "Fearsome Four" were originally a gang of underworld Dueling criminals working under Mr. Heartland. All of them except for Mr. Heartland were recruited as Barians by Vector to aid the former. Mr. Heartland eventually joined them after falling through a portal and ending up in the Barian Sea.

Later in the series, Heartland was eventually revived by Vector using the power of Don Thousand, though his form was that of a fly. Later on, Vector restored Heartland into his normal human form and summoned the other members of the Fearsome Four to accompany him in his journey to take the "Numbers" from Yuma Tsukumo, Reginald Kastle and Kite Tenjo.


Being Barians, the Fearsome Four have superhuman abilities such as teleporting and taking into alternative forms that give them unique abilities, such as Erazor being capable of stealing memories, Chironex capable of becoming living water and poisoning others and Scritch being able to turn into a mosquito at will. They have also shown the ability to alter a Duel by using a Crest akin to that of Don Thousand's Emblem to halve the opponent's Life Points and add it to their own at the very beginning of the Duel, effectively cheating.

Fearsome Four[edit]

Each member has an alternate form based on different invertebrates. These are all often considered pests by humans, with the reasons for this ranging from being plain annoying to carrying deadly diseases.

Each member also carries a "Number" ranging from 1 to 4 given to them by Vector. These were, however, fake "Numbers", ultimately self-destructing along with Mr. Heartland when all of the Fearsome Four were defeated. The numbering of these fake "Numbers" carried several obvious puns with them, such as "Number 4: Stealth Kragen" being used by Chironix against Quattro, which the latter pointed out when it was summoned.

Identity Number Form(s) Current Status
Human Barian
Mr. Heartland Number 1: Infection Buzz King
Mr Heartland Reborn.png
Mr. Heartland's Barian Form.png
Defeated ("Numbers" "2", "3" and "4" taken from Kite Tenjo, Trey and Quattro; defeated by Yuma and Astral)
Scritch Number 2: Ninja Shadow Mosquito
Defeated ("Number 2" taken by Kite Tenjo)
Erazor Number 3: Cicada King
Erazor form.png
Defeated ("Number 3" taken by Trey)
Chironex Number 4: Stealth Kragen
Defeated ("Number 4" taken by Quattro)


  • Chironex is the only member whose alternate form is not an insect.
    • He is also the only member who used the Barian Emblem against his opponents by asking first and having them agree to it, instead of cheating against their will.
  • They are the only Barian-related characters who do not use any form of Rank-Up.


  1. Yu-Gi-Oh! ZEXAL episode 112112: "Memory Thief: Part 1"