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Kid Niki: Radical Ninja is a side scrolling platform action game developed by Irem and published by both Irem and Data East. Kid Niki: Radical Ninja was originally released in the arcade in 1986. A year later Irem made a home port of Kid Niki: Radical Ninja on the Nintendo Entertainment System (Platform) (NES), and later released it on the Commodore 64 (Platform) and Apple II (Platform).
Kid Niki: Radical Ninja begins with Kid Niki training in Ninja School. While Kid Niki is training, a bird gets shot down by an arrow containing a message from the Evil Stone Wizard, saying that he has kidnapped Princess Margo (Kid Niki's girlfriend). Without hesitation, Kid Niki jumps through the school’s thin wall and goes to the rescue.
Armed with a spinning sword, Kid Niki travels to 7 different locations (8 levels in total) each one ending with a boss. Kid Niki finds power-ups throughout the journey, such as: A golden bell which gives him the ability to throw ninja star projectiles from his sword; a silver bell that gives him a rotating force field eliminating anything it touches; and a White Ninja suit that gives Kid Niki the power to absorb an additional hit. Both the gold and silver bells power-ups last for a limited amount of time.
There are numerous secrets that are scattered around each level. These secret bonus areas either contain a mini game or are just empty rooms full of invisible hidden scrolls.
Kid Niki: Radical Ninja has 7 different bosses each with their own unique ability:
| Boss | Boss Descriptions |
|---|---|
Death Breath blow attack
| |
Spike
| |
Horned Witch
| |
| |
Mad Monk
| |
Samurai Guard
| |
Stone Wizard
|