I thought that one was obvious.
The real mindblowing one is that the Game Over music has a piece of the Flying Man song in it, but not the version played in the games, the one on the vocal soundtrack.
Game Over:
Flying Man:
Also, the Saturn Valley theme has a piece of the Mother 1's monkey cave song.
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Okay, I rolled a 14. What's that mean? Hsu
That you're a cheater. This is a 12-sided die. Chan