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Ninjis are toy versions of the enemies of the same name that appear in Mario vs. Donkey Kong. They jump up and down in one spot, acting much like the second type of Ninjis in Yume Kōjō: Doki Doki Panic and Super Mario Bros. 2, and can give Mario a boost to higher places if he jumps on their harmless heads. They have a windup key on their back like the rest of the mini-minions, and have a purple coloration like the version of the Ninjis seen in the reissues of Super Mario Bros. 2. They are first seen in Fire Mountain. They cannot be destroyed, and touching one results in Mario losing a life.
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