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A robot girl discovers paradise is just a fancy toilet — literally.
TMDB
62

Dr. Slump and Arale-chan: Hoyoyo! City of Dreams, Mechapolis (1985)

toilet-humor surrealismretro anime chaoskid-friendly anarchy

Overview

AnimationComedy

Children are lured to Metropolis only to find that the renowned, mythical city may not be the happy-go-lucky utopia they'd thought it would be.

Flag of JPJPJapanese
shounenanimebased on mangarobotsurrealismparodyrobot girlinventorscatological humorslump+1 more

Standout Aspects

Writing

Toriyama's absurdist satire of Disneyfied dreams.

Practical Effects

Hand-drawn Mechapolis — peak cel animation craft.

Sound

Mitsuko Horie's Obotchaman theme slaps unreasonably hard.

Best for:Solo: Weird 3am nostalgia trip for 80s anime heads.·Friends: Drunken group watch — count the poop jokes.·Rewatch: Spotting Toriyama's Dragon Ball prototypes.
Heads up:Disturbing: Children actively hunted for organ harvesting — played for laughs.
Toyoo Ashida

Director

Toyoo Ashida

ReleasedJul 13, 1985
Runtime38m
StatusReleased

Vibe

Pacefast
Intensitymedium
Tonelight
Feellight

Top Cast

Mami Koyama

Mami Koyama

Arale Norimaki (voice)

Kenji Utsumi

Kenji Utsumi

Senbei Norimaki (voice)

Mitsuko Horie

Mitsuko Horie

Obotchaman (voice)

Kazuko Sugiyama

Kazuko Sugiyama

Akane Kimidori (voice) / Kinoko Sarada (voice)

Mariko Mukai

Mariko Mukai

Midori Yamabuki (voice)

Ask about Dr. Slump and Arale-chan: Hoyoyo! City of Dreams, Mechapolis

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Deep Dive

Trivia, insights & behind the scenes

Trivia

This film's Mechapolis design directly influenced the Red Ribbon Army arc in Dragon Ball — same director, same chaotic energy.

Cultural

Released during Japan's 'bubble economy,' the film's fake-utopia premise accidentally predicted 1990s disillusionment. Toriyama's poop jokes hit different when capitalism itself feels like a scam.

Gallery

Reviews

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Dr. Slump(11 films)
Dr. Slump and Arale-chan: Hello! Wonder Island poster6.7

Dr. Slump and Arale-chan: Hello! Wonder Island

1981

Dr. Slump: Hoyoyo! Space Adventure poster6.1

Dr. Slump: Hoyoyo! Space Adventure

1982

Dr. Slump and Arale-chan: Hoyoyo! The Great Race Around The World poster7.0

Dr. Slump and Arale-chan: Hoyoyo! The Great Race Around The World

1983

Dr. Slump and Arale-chan: Hoyoyo! The Treasure of Nanaba Castle poster4.8

Dr. Slump and Arale-chan: Hoyoyo! The Treasure of Nanaba Castle

1984

Dr. Slump and Arale-chan: Hoyoyo! City of Dreams, Mechapolis poster
Now Viewing

Dr. Slump and Arale-chan: Hoyoyo! City of Dreams, Mechapolis

1985

Dr. Slump and Arale-chan: N-cha! Clear Skies Over Penguin Village poster6.5

Dr. Slump and Arale-chan: N-cha! Clear Skies Over Penguin Village

1993

Dr. Slump and Arale-chan: N-cha! From Penguin Village with Love poster8.0

Dr. Slump and Arale-chan: N-cha! From Penguin Village with Love

1993

Dr. Slump and Arale-chan: Hoyoyo!! Follow the Rescued Shark... poster6.2

Dr. Slump and Arale-chan: Hoyoyo!! Follow the Rescued Shark...

1994

Dr. Slump and Arale-chan: N-cha!! Excited Heart of Summer Vacation poster4.0

Dr. Slump and Arale-chan: N-cha!! Excited Heart of Summer Vacation

1994

Dr. Slump: Arale's Surprise Bang poster4.0

Dr. Slump: Arale's Surprise Bang

1999

Dr. Slump: Dr. Mashirito and Abale-chan poster4.3

Dr. Slump: Dr. Mashirito and Abale-chan

2007

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