SCROLL TO THE BOTTOM FOR THE STRATEGY IN ITS SIMPLEST FORM

I don't want to dwell on this guide too much but I will attempt to explain the AI in the simplest terms I can while also giving my strategy that I used to beat it on my first try purely using some research I've gotten over the years before attempting a FNAF1 marathon, showing that anyone can do it, even you, I can't even beat night 6 on FNAF 2 so I'm no FNAF god, FNAF 2 is just really hard. As long as you have a certain amount of decent luck you will be fine and dandy as making some mistakes is completely fine!

I will stress, YOU DO NOT HAVE TO BE PERFECT FOR THIS ONE, I made many mistakes in my video myself!
You just need to get the method down, and once you've got that, you can use your own flexibility to be slower or faster.

In order to freeze Foxy in place you simply need to flip the camera up, flipping up and down quickly is best to conserve your power as this is where quite a bit of your power is going towards, you don't need to look at foxy at all during 4/20 since it only really matters for the camera to be on 4B, as long as you're flipping the cameras but it's good to check every hour or so. A fantastic tidbit to know about Foxy is the fact that he cannot attempt to move again after you flip your camera back down until a random time between 0.83 - 17.48 seconds, there is a check that happens every 5.01 seconds that will make him make him go to the next stage guaranteed, so if you're quick you can keep him locked indefinitely but there is also a possibility of getting unlucky with the check and random number lining up while your camera is down, or if you are lucky/quick enough you don't have to worry about him much at all, to check Foxy to see what stage he's at in case you think you were too slow, close the right door before checking Foxy if you think he might make a move which is something I'd recommend doing when Chica is outside your door and she forces you to close it.

Literally all you need to do for Freddy is keep your camera on 4B and he cannot move, only time you need to worry about him is when you want to check Foxy, close the right door or check when Chica attacks and you're forced to close the right door before switching cams then switch back to 4B once you're done.

Since your camera is almost always on 4B you can always see Chica coming, Chica can only move through adjacent rooms so she won't teleport to right outside your door, you will always see her coming. Close the right door when she comes over, she will leave guaranteed after about 5~ seconds no matter what.

Bonnie is the only real unpredictable animatronic as you can never really know where he is at all times, rely on your lights as much as possible when flipping down your camera as Bonnie is the only animatronic you really need to check for via your lights since you can see Chica coming on Cam 4B. Close doors when necessary, he will leave guaranteed after ~5 seconds as does Chica.

THE START
• Flip and put your camera on 4B
  
• Flip down your camera
  
  THE STRATEGY
  
• Check left lights
  - BONNIE NOT THERE -> Open door / Leave door open
  - BONNIE THERE -> Close door until he leaves (5~ Seconds)
  - DOOR CLOSED ON BONNIE OR BONNIE NOT THERE -> Flip the camera back up
  
• Once camera of 4B is back up and visible
  - FREDDY IS ON CAM 4B -> Flip the camera back down
  - CHICA IS ON CAM 4B -> Flip the camera back down and read "Checking for Chica"
  
• Checking for Chica (IF SHE'S ON 4B, MOVED TO DOOR, OR RIGHT DOOR CLOSED)
  - Check the left and right door lights (If Bonnie is there, close left door and continue)
  - - CHICA NOT THERE -> Open door / Leave door open
  - - CHICA THERE -> Close door until she leaves (5~ seconds)
  - - DOOR CLOSED ON CHICA OR CHICA NOT THERE -> Flip the camera back up
  NOTE: Add checking the right door to your strategy until Chica leaves your door
  
• Flip down camera
  
• Repeat
  
  
• Optional: If you want to check Foxy, when the right door is closed you can switch your camera to Pirate's Cove and switch back once you're done, if you're unlucky and he is out, close all doors and check Cam 2A then back to 4B and wait until the banging sound plays then open the doors back up if nobody is outside of them.

A really bad run that ended up being a winner anyways!