This is the list of bosses that the player fight on the story mode or the Boss Battle mode.


Character Name Series Description Meet At...
Bill appearance Bill Cipher
Gravity Falls Icon A mysterious demon summoned by Lil' Gideon when he tried to take over the Mystery Shack, he is one of the four members of the GCV as they try to take over the Toon World. He can use fire, can create evil things (he is the creator of the Shadow Viruses) and he change his body into different things. Episode 1
Episode 20

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