Hey, I made a guide for the previous version of FNAFB so why not make an updated one.
Before I start, I mention the right and left hallways a lot and I know forgetting directions happens to the best of us, so in case you forgot,
Left = < (Bonnie and Foxy's Hallway)
Right = > (Chica and Freddy's Hallway)
Freddy: Freddy moves when she giggles, in total it takes 6 giggles for Freddy to enter your office. Meaning that she'll be able to attack you after 5 giggles. So keep track of how many times she does this. Freddy can be stunned by having the camera put on whatever room she is in. This works even whilst the camera is down. It's best to keep the camera on the right hallway camera but i'll talk more about that in my 4/20 guide.
Foxy: Unlike the last version, it is now necessary to watch Foxy sprinting down the hallway before closing the door. (unless you want to lose 20% of your battery) Foxy can be stunned by having the cameras up. Doesn't matter which camera. So I'd suggest actively checking the Left hallway camera to see Foxy sprinting down the hallway or the pirate's cove camera to see what stage of coming out of the cove Foxy is on.
Bonnie And Chica: They're basically the same so i'll put them together. It seems to me like Bonnie is more aggressive than Chica. Usually coming earlier on in the night. Bonnie can only attack through the left door whilst Chica can only attack through the right. You don't need to check for them on the cameras. Rather, listen for their footsteps. You can tell whether Bonnie or Chica is coming based on the noises they make. For example. If you're facing Bonnie's door and the footsteps are faint. Chica is coming. But if you're facing Bonnie's door and the footsteps are loud, Bonnie's coming. You only used to be able to know Bonnie was gone based on the head light lamp thingy in the hallway but now Bonnie has a very noticeable shadow. As for Chica, She's easily spotted with a flick of the hallway light,
Golden Freddy: If you see Golden Freddy simply flip up your camera and she'll disappear. You have a lot of time to do this so you shouldn't be dying to her unless you don't know her mechanics.
100% completion: There is a doughnut in the office, Click on it for a secret sex scene which adds to completion. After completing night 5, dying to all of the animatronics again will give you their second sex scene, which contributes to completion. After completing night 6 you get access to night 7 which is like a bonus mode, (I forgot what it was actually called) By typing out "1987" In their cpu levels and beating the night you get completion. Same thing for typing in "6969". Finally, beating 4/20 mode will give you 100% completion.
4/20 guide: (for nights 4-5 open the camera in 2% battery ques) When the round starts flick to the left hallway camera until your battery is at 98% then close it until your battery reaches 97% then open it until your battery reaches 96%. You get the gist. repeat that process of opening and closing the camera after every 1%. Wait until about 1am. If you think you've heard enough of Freddy's giggles, check what stage foxy is on before switching to the right hallway camera If foxy was fully out of pirate's cove close the right hallway door before checking the left hallway camera for Foxy running down the hallway. If Foxy doesn't run and Freddy giggles signalling she has moved, open the right hallway door before checking on Foxy again. Remember. Only check with the visual battery ques that I mentioned previously. Once Freddy giggles again, switch the camera back to her. Everytime you want to check on Foxy close the right hallway door and switch from The right hallway camera to the left hallway camera. If Foxy doesn't run switch back to The right hallway camera and open the right hallway door. If Foxy does run make stopping her your first priority before switching back to Freddy's camera/opening the door.
I hope this helped! Let me know if you want me to clarify anything!