Double page spread from “The Book of Bill” with various bad endings for the twins. I attempted to label them all with their respective scenario.
Blind eye twins: the twins minds are erased and they join the cult. From s2e7 “Society of the Blind Eye”
Sock Opera Dipper: Described in journal 3, Bill’s plan to jump off the water tower and strand dipper forever succeeds. From s2e4 “Sock Opera”
Petrified twins: unsure? Potentially where Bill wins in s2e20 “Weirdmageddon 3”
Zombie twins: self explanatory. From s2e1 “Scary-oke”
Fight fighters Dipper: Loses to Rumble. also maybe Giffany wins? Either s1e10 “fight fighters” or s2e5 “Soos and the Real Girl”
Babel (Bill Mabel): Bill possesses Mabel. From s2e4 “Sock Opera”
Woodsman’s Curse Dipper: Pacifica fails. From s2e10 “Northwest Mansion Mystery”
Gnome Queen Mabel: Mabel gives into the gnomes. From s1e1 “Tourist Trapped”
Sugar High Mabel: self explanatory. From s1e5 “Inconveniencing”
Summerween twins: the twins fail to raise enough candy for the trickster. From s1e12 “Summerween”. fun fact; the nytimes ran an article on Summerween last week so you know it’s legit now.
Little Dipper twins: twins never grow back to full size. From s1e11 “Little Dipper”
Possessed Mabel: Mabel is never freed from the shop owner ghosts. From s1e5 “Inconveniencing”
Double dipper clones: various copies of dipper. From s1e7 “Double Dipper”. The Dipper holding up Possessed Mabel has a glowing pair of scissors in his back, possibly from the episode? Unsure.
Edit: the scissors dipper is from s1e4! He’s lost the fight to Gideon!
Bipper: Bill possessed dipper. From s2e4 “Sock Opera”
“Blendin’s Game” Erased Dipper: Blendin beats the twins at Globnar and wishes them out of existence. From s2e8 “Blendin’s game”
Those are all the ones I could discern. If anyone notices more or has ideas for the few unknowns please add on!