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Aliens (Japanese: 宇宙人 Uchūjin) are interstellar creatures that come from outer space, rarely appearing in the Yo-kai Watch series.

They notably play a bigger role in the Y School Heroes series, acting as the main antagonistic faction and conflict. Mazera is known to be the leader of one of the most known and widespread aliens, which range from canine creatures to human vessels corrupted with Mazera's mind-bending powers.

List of known Aliens[]

Major Aliens[]

Alien (Japanese: 宇宙人 Uchūjin) Appearance Y Medal
Nayu Kuruhoshi
Meteogon
Black Army
Big Black
Big Black 2
Grey Agent
Rigel
Rigel HG
Dober
Mazera
Elzemekia
Pit Bull
DG Trooper
Zodiaraia
Black Demon
Tidas
Elze
Mazera Titan
Yuki no Kyoshin
Mazera Bolt
Depuropusu
Myuze
Ozma
Terraozma

Minor Aliens[]

Alien Appearance Y Medal
Grey Agent (Spirit Form)
Alien Dog
Moguramos
Komaka Kaneni (Alien beast)
Tsutomu Sanpo (Alien beast)
Kaito Hotei (Alien beast)
Max Kakidome (Alien beast)
Alien Crow
Crowman
Wan in Black
Ten in Black
Doggy Special Task Force (Poo, Tosan, Huskian, Akiko and Doruru)
Usuke
Uki Shogun
Bunny Army
Hojiro Sameki
Tidas' Son
Dober Vader
Annan
Ozero

Aliens introduced in Y School Heroes: Bustlin' School Life[]

Alien (Japanese: 宇宙人 Uchūjin) Appearance
Obandesu
Ojindasu
Army Sting
Little Gray
DG Commander
DG Aggressor
Lime Spy
Omega Silver
Gold Titan
Indigon
Shin Dober
Elze Shadowman

Trivia[]

  • It is unknown if the aliens have a connection with the Members of the Mikakunin Tribe, despite sharing similar appearances and having a similar UFO design to the one Mazera's force uses.
  • Akihiro Hino was inspired by the 1989 video game Last Armageddon when he made the Aliens as the main antagonists of the Y School Heroes series. He also wanted to make the player fight something that the player doesn't come across normally in another dimension.[1]
  • Despite typically referred to as "Uchūjin" in the Japanese anime, Aliens can also be referred to as "Eirian" (エイリアン), or "Seijin" (星人).
  • Despite being framed as the main antagonistic faction of the Y School Heroes series, multiple of the aliens have joined forces with the YSP Club, the most notable being Nayu Kuruhoshi.