Hello, everyone. I find it important in the beginning here to make a sidenote of sorts. I will be using 2 videos to supplement my guide here as I slightly changed the actual Ennard "fight" tactic from the guide.
There are a few small things to go over and then prerequisites.
1) As far as I know, the game must be beaten first in the real ending, giving you the first star on the main menu, before being able to do the next steps to be able to attempt the "fake ending" here.
2) You will need to beat the "Baby's Circus Minigame", giving you the second star on the main menu, which realistically would not be a good idea to read through, so I will just link the video for this part. (If you are on Xbox, to access the minigame from the menu, you must go to the Extras menu and press 
on Baby in the "Animatronics" list).
3) Every time the Ennard fight is failed it will force you to restart at the beginning part in the control room. (You will have to rerun to Baby and perform the keypad minigame on her ear).
4) I highly recommend using a stopwatch like a timer on your phone and setting it to 9 minutes. (The night is long at 9 minutes long, so 1.5 minutes per in-game hour).
Now to get to the boss fight. (It's a regular 12-6 level like in the original games).
I won't go over the beginning until Baby's minigame. I recommend playing on a PC if possible because of better control for fine movements seeing as Ennard will jumpscare you in around 2 seconds if you fail to press the key or press the wrong ones. If you still prefer to play on Xbox for this or don't have the option to switch, try turning down your analog stick speed, you can also change the "hold trigger" speed to perhaps make finer movements when needed to. I personally just found it much more reliable to beat the keypad minigame on a mouse and keyboard setup myself. The amount of keypad numbers needed and the code itself changes each time so there is no singular code.
Once you beat this and you get back to the auditorium, make sure to turn your analog stick speed back up to as fast as you're comfortable with. If you would like, you can also activate cursor wraparound which will allow you to go all the way to the left or right and teleport around to the other side. I recommend doing this ONLY after getting into the private room. AS TO GETTING TO THE ROOM, ignore Baby's directions and only go to the right side and RUN don't walk. You should hear "Access Granted" in a female robotic voice meaning you succeeded getting into the room and all prerequisites are achieved.
If you would like a direct video guide close enough to what I am going to say in video form, well here you go....
As for my input to beating it, there are a few differences to his guide.
1) No matter if you are playing on Xbox or PC, the game is still the "Console Port". The problem with this is such: Ennard tends to make much more "silent movements" than his PC counterpart.
2) I recommend for the first 40 or so seconds, not to even open the camera until you hear a noise. It is very important to have a stereo headset that can detect left, right, and center noise as to know which side to monitor instead of wasting power each noise searching for him. Power is incredibly finetuned in this night. Many runs will be decided straight off the bat as a loss with Ennard sitting at a closed door until the next decade, because he decided to go take a lunch break or something.
AS TO ACTUALLY BEATING THE NIGHT
12-3:59AM
As soon as the room comes into vision, you can set the timer to begin the 9 minutes.
Upon the commencement of this night, the narrator will talk for 30 seconds or so, and then Baby will begin to speak at around 93%, ignore Baby as her speaking means literally nothing and is only there to distract you. Ennard may or may not make moves towards you and sounds. I would recommend completely avoiding checking cams until you hear him first, even if you die, it's early and you will have lost barely any progress, while if you don't check the cameras looking for him for a minute or so, the power not having been used will be incredibly important later on.
I would like to quickly interject the recommended time and power amounts that are ideal for each hour marker.
1AM- 84-86%+
2AM- 68-70%+
3AM- 49-55%+
4AM- 34-40%+
5AM- 18%+ (got lucky and had 21% on my successful attempt)
SIDENOTE: Unlike FNAF 1, running out of power here late into 5AM is almost always still a certain death. Ennard atacks too quickly.
Back to the guide, if you'd like to play a bit riskier to save some power early on, (12-2AM) you can choose to wait until you hear 2 sounds in the same direction before opening the camera, but as stated before this can be risky because of "silent movements" being more common on the Console Port. If you choose to do this, I recommend only doing it a few times per in-game hour rather than the whole tactic as you will most certainly die. At 3AM I would recommend preparing your mindset for 4AM and later. Up until 4AM, you will be hearing a sound, then choosing to react or wait for another sound, and then open camera to see Ennard's phase, then reacting by closing the door or doing nothing if he backs off. Only close the door/vent when he is right up against the doors or vent opening. I recommend here, that you check the cameras when a door is closed every 4 seconds to make sure he didn't silent move away and you waste power keeping the door closed for nothing. You can make sure to check the cameras every 8 seconds to make sure he didn't silent move. This all changes when 4AM, onward hits.
4-6AM
From 4AM, onward the previous tactics go out the window as he becomes much more aggressive, you will want to check the cameras every 6 seconds now when not hearing movement, along with Baby's voice changing to Elizabeth Afton's voice. (This is still just a distraction/ cool lore thing). Now everytime you hear a noise you will want to close the door or vent immediately, check Ennard's location and then react by opening or leaving it closed because Ennard can charge and instantly kill you if you are too slow. As far as this goes, just be careful and attentive, don't forget to ration power and good luck!
