WARNING!! THERE ARE MAJOR, MAJOR SPOILERS AHEAD. DON'T CONTINUE TO READ UNTIL YOU'VE SEEN ALL THE EPISODES.
Anyways, Gravity Falls has been the best comedy/mystery show from 2012-2016. There have been MANY secrets and mysteries through out the entire series, even the shorts. So I am going to tell you everything I know about the secrets of Gravity Falls from Tourist Trapped to Weirdmageddon Part 3. Lets get started!
1. Dipper's real name
People have always wondered what Dipper's real name was since in Double Dipper, it was revealed that Dipper was a nickname due to his big dipper birthmark. Well in the credits of Weirdmageddon part 3, there is a tree with names that say Mabel + Gabe. Now in the Gravity Falls: Between the Pines special, Alex Hirsch sated that Mabel and Dipper's names are related. So his name might be Gabe but remember, Mabel dod have a crush named Gabe Bensen but Gabe did dump Mabel so it might be relating to Dipper.
2. Cipher Wheel
The Cipher Wheel appears after the theme song of every episode including Weirdmageddon Part 1, 2 and 3 except Bill is ripped of the wheel. People have figured out some of the symbols like the Pine Tree representing Dipper and the shooting star representing Mabel. Here is correct list of the Cipher Wheel:
- Pine Tree: Dipper
- Shooting Star: Mabel
- Llama: Pacifica
- 6-Fingered Hand: Ford
- Crescent Thing: Stan
- Question Mark: Soos
- Glasses: McGucket
- Star: Gideon
- Ice: Wendy
- Stitched Heart: Robby
And by Stan's symbol there is a code that decodes to "Stan is not what he seems"
3. Everything was planned from the start
Gravity Falls was stated by Alex Hirsch that it was entirely planned from the start. But in Dream Scappers, it was shown that Stan wore glasses as a kid but in Tales of Two Stans it was should that Stan didn't wear in glasses but Ford did. This is actually a bigger deal than it seems.
4. Bill's last words
In the second have of Weirdmageddon Part 3, when Bill is about to be erased in Stan's mind, he says something that sounds like gibberish. But when played in reverse, he says "A-X-O-L-O-T-L. MY TIME HAS COME TO BURN, I INVOKE THE ANCIENT POWER THAT I MAY RETURN" This means the Bill Cipher may return. And A-X-O-L-O-T-L is a regenerating lizard-like creature. Also at the end of the theme song where there is supposed to be a backwards whisper. But in the weirdmageddon version, instead of a whisper its Bill saying in reverse "Im watching you nerds"
5. Theme song mysteries
Like I just said, there is a whisper at the end of the theme song for every episode including Weirdmageddon except those whispers have nothing to do with the cryptogram at the end of the weirdmageddon credits and the whisper is not what he seems in Not What He Seems. All the whispers include: 3 letters back, Switch A and Z, 26 letters (relating to A1Z26) and Key Vigenère. Also on the watertower in the weirdmageddon version of the theme song, the watertower flashes and says "JUDYLWB IDOOV" which translates to "GRAVITY FALLS".
6. Character death
In season 2, Alex Hirsch said that a character would die in season two but there is a picture flash at the end of Weirdmageddon Part 1 that has a picture of bill and cryptogram that decodes to "GAME IS OVER, AND I WON. NOW IT'S TIME TO START THE FUN. I ALWAYS LOVE CORRUPTING LIVES. NOW LET'S SEE WHICH PINES SURVIVES." However, none of the Pines died but Stan had his mind erased to defeat Bill but later it was restored and the only character that died was the mayor who possibly started WW1.
7. Author of the Journals
You probably already know this but the author turned out to be Stan's brother!
There were tons mysteries solved throughout the series but there were still mysteries that weren't solved. Here are some of the unsolved mysteries yet to be solved
Dipper's real name, however his real name has probably been thought to be Gabe or Gabel, but Alex Hirsch or any of the crew of Gravity Falls has yet to confirm that Dipper's real name is Gabe or Gabel.
What happened to Blendin? In Weirdmageddon, after Bill destroyed all of the Time Anomaly Removal Crew, Blendin said that "This has gone from bad to worse" than he just disappears and not to be seen again.
What deal did Blendin make will Bill? At the end of Dipper and Mabel vs. the Future the Blendin asks Mabel for the Time Rift (Remember the fact that Mabel didnt know what the rift was) so she can have an endless summer. But then Blendin smashes the rift which turns out he was possed by Bill. It was not speculated how or why Blendin Blandin Blenjamin was possessed.
And trust me there are a LOT of mysteries yet to be solved.
The Gravity Falls Crew Never Forgets
In "Little Dipper" Soos puts on Stan's fez hat and looks in the mirror and says "One day..." and at the end of Weirdmageddon Part 3, Stan tells Soos that he the new owner of the Mystery Shack.
In "Headless Hunter" Mabel draws a waffle with buffy arms when trying to make a wax figure. And in Weirdmageddon Part 2, It shows that her guards are waffles with buffy arms.