Monster Kid is a child adopted by Asgore and Toriel. They are swapped with Asriel.
- ↑ 1.0 1.1 about & F.A.Q Official Underswap Tumblr
- ↑ 2.0 2.1 2.2 Is Monster Kid the child of Toriel and Asgore? Official Underswap Tumbl
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