Giovanni Pedroza, 5, said, "I just close my eyes and my eyes were thinking that the Momo challenge was right there."
The online hoax caused the 5-year-old to call police.
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When the dispatcher answered, she assured Giovanni that the character was not real, saying, "If anybody asks you to do anything like that, you always tell your mom and dad."
The 5-year-old and the dispatcher, Natalie, met for the first time after she invited him to the police department for a tour.
The police department gave him a flashlight and a teddy bear to protect him from his fears of Momo.