Garrickson baby
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The Garrickson baby is a character introduced in Mother, and is a resident of Youngtown who possesses psychic abilities. The baby's father, Tom Garrickson, was one of the few adults to not be abducted by aliens. Conversing with the baby through speech will only result in it uttering incomprehensible words, but if Ninten tries to communicate with it through Telepathy, it will begin to express itself in an understandable manner and also teach Ninten and Ana how to use Teleport.
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