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Ultraman Wiki

Backacoon  (バッカクーン Bakkakun) was a Kaiju that appeared in the TV series, Ultraman Neos, episode 5.

Subtitle: Parasitic Monster (寄生怪獣 Kisei kaijū)


Ultraman Neos

The day after Shildoban died a large fungus was found in the middle of the city. HEART used the Heat Buster on the mushroom, but it released spores that quickly extinguished the large fires. The spores quickly spread towards HEART's position as they were trying to protect a small boy and his pet parrot. Everyone survived the fungus's spores, but HEART didn't know how to stop the mushroom. As the day went on the mushroom broke itself with energy and evolved into the monster Backacoon. HEART attacked Backacoon and led him away from the city and to the site they killed Shildoban. In one of the HEART Winners Nana was brought down by the gas-like spores of the fungus Kaiju and began to walk towards the site where she crashed. As Nana was having trouble with her seatbelt Genki quickly turned into Ultraman Neos before anything worse could happen. Backacoon was easily out done by Neos and became desprate by using a mushroom from his tail to revive Shildoban to assist him. HEART tried to disconnect the root that was keeping Shildoban under Backacoon's control, but failed as the two monsters were more than Neos could handle. Hino showed up in the other HEART Winner and distracted Backacoon while Neos dealt with Shildoban. Hino disconnected the root on Backacoon's tail making Shildoban dead again. Neos quickly finished Backacoon off with a classic Spacium Beam.


  • Suit actor: Toshio Miyake
  • Backacoon's suit was made by combining the head of Psycho Mezard and the modified body of Sulfas.
  • Much like Mushra from Ultraman Taro, Backacoon started off as a mushroom before gradually becoming a mushroom-like kaiju.


Giant Mushroom


  • Height: Unknown
  • Weight: Unknown
  • Origin: Developed land of Asahigaoka estate
Powers and Weapons
  • Spores: The giant mushroom can unleash deadly yellow spores from its underside.
  • Monster Form: Once toppled down, the mushroom can take the form of monstrous Backacoon.



  • Height: 49 m
  • Weight: 47,000 t
  • Origin: Developed land of Asahigaoka estate
Powers and Weapons
  • Spores: Backacoon can breathe out a deadly stream of yellow spores from its mouth. These will choke an oppoenet and bring them to their knees and can also extinguish fires.
  • Parasitic Tail: A root can spawn from one of the white mushrooms on Backacoon's tail and will merge with a dead monster. From then on Backacoon can control the monster's body and even siphoning their remaining energies, but once the root is disconnected that monster will be dead again.


Ultraman Neos Kaiju
Pilot Alien Zamu | Drengeran
Ultraman Neos Arnagaruge | Alien Zamu (First, Second, Third, Esura) | Seagorian | Nozera | Sazora | Shildoban | Backacoon | Alien Zamu II | Zamu Revenger | King Bamos | Rock Eater | Lafreshion | King Dainas | Giga Dread | Grall | Mensch Heit