Okay I can't be the only one who made this connection-
Lord English/Caliborn from Homestuck:
(old)/(young)
-Is green
-has interchanging pool balls for eyes
-has 2 toes on each foot and 4 fingers on each hand
-originally had a chain on his leg
-has to larger sharp teeth on each side of mouth
8 Ball From Gravity Falls:
/
-Is green
-has 8balls for eyes
-has 2 toes on each foot and 4 fingers on each hand
-has a chain on his leg
-has 2 larger shar teeth on each side of mouth
This wouldnt be the first time GF has supposedly referenced homestuck, but it's definitely the most obvious.