The two Dipper copies that stole Robbie’s bike, and then disappeared into the forest. They never looked back.
They can’t know what happened to the other copies, but they can guess. Alpha Dipper doesn’t have a place for them in his life long term.
(I’m convinced Trelane came to the same conclusion and wittingly committed suicide by drinking that soda.)
They’ll never see Mabel again. (Again? No, that’s Alpha Dipper’s memories. They’ve barely met her.) The only twin they have is each other.
They’re not going back to Grunkle Stan. Not even when Weirdmageddon happened, when gnomes and manotaurs and unicorns were all seeking refuge at the Mystery Shack did these boys try to get help from him. They survived the end of the world on their own, somehow.
They’ll never see their parents or their home in California. They’ll never go to school.
Most likely, they’ll never grow up. They’re copies of Dipper at age 12, and that’s what they’ll always be. They don’t eat, or drink, or sleep. They’re not human.
And yet, just from this picture, we know they’re determined to live.
They’re out in the rain, in raincoats and a makeshift tent. There’s no way they’re staying perfectly dry in that. Perhaps they’re discovered a way to stabilize themselves so that liquids don’t dissolve them anymore – perhaps stabilization happens naturally once a copy has existed long enough. They’re real and they very much intend to stay that way.
Perhaps they stole the stole the stuff they’re seen with. Perhaps there’s still someone in the human world they trust enough to help them out. If so, I can see it being Soos. He’d do anything for the Pines family, even its weird little outgrowths. A book here, a banjo there, a couple of raincoats. No one will notice.
These boys are part of the Gravity Falls weirdness now. They’re cryptids. Two eternally young boys with the same face, sometimes encountered in the forest, gone before you know it. There are stories about them. Some are true, others are not.
Maybe some day, 50 years along the line, when Dipper is both a grandfather and a grunkle himself, he’ll stumble upon them in the thickets around Gravity Falls. They haven’t changed.
well i guess this is it 