Gravity Falls Journal 3 Deciphered

I recently bought my own copy of Journal 3 from Gravity Falls! I spent a few days deciphering its pages and all of the codes that I could locate and find a cipher for are in this book! Only the pages with codes are in this book, as to not steal all of Alex's work, so if you want to read the entire book, I highly recommend purchasing it, you will absolutely not be disappointed.
The pages contain the whereabouts of the code on the page, the undeciphered code, the name of the cipher used to decipher the code, and an image of the page with the codes circled in red.
Enjoy!