fnaf endoskeleton

FNAF Endoskeleton Guide

Latest posts by Ognjen Miljkovic (see all)

Five Nights at Freddy’s is mainly known for its wide roster of remarkably scary animatronics – they are something that you will certainly never forget. Have you ever wondered what’s underneath those animatronics? They may be scary from the outside, but are they also scary from the inside? The short answer is – yes, they certainly are.

The endoskeletons inside the animatronics are interesting despite the fact that they are almost always forgotten during the series. I really enjoyed them throughout the games, and I would certainly love them to appear more.

So today, I’m going to take a look at every endoskeleton in the game, starting from the first-ever Five Nights at Freddy’s to even one of the most despised FNAF games of all time – FNAF World. In this guide, I’m going to give you brief information on everything you should know about Five Nights at Freddy’s endoskeletons.


In this article, you see every endoskeleton that made an appearance at some point in the game series in the simplest format possible. First, I will take a brief look over their characteristics, appearance, and games where they come from.

Some of the picks you will encounter on this list may surprise you since most of these animatronics are now long forgotten. Mostly because of the new releases where they don’t appear as much as beforemost of them only appear in a game or two.




Endo-01 is an endoskeleton that made its debut appearance in the first installment of Five Nights at Freddy’s as one of the objects in the game’s background. He was also on the front cover of the first game, where he appears right behind Freddy. He can be seen as a background prop by the cameras during the game.

In FNAF World, he is a playable character and an antagonist that you will have to fight during the game. He is one of the most useful characters that you will definitely need when progressing through the game. I, personally, always like to keep him on my team.

After that, he made a cameo appearance in Five Nights at Freddy’s: Help Wanted, where he is an Easter egg that you can encounter during the game. He is just a background character who appears during Ennard’s Vent Repair, Pizza Party, and even during the Lolbit’s level.

In Five Nights at Freddy’s AR: Special Delivery, he appears as one of the major characters and antagonists that can actually jumpscare you, unlike in the other games where he was solely a background character or an Easter egg. Here he is called Bare Endo instead of just Endo-01.

Endo-01 is an endoskeleton that all the animatronics from the first Five Nights at Freddy’s inhibit. He is a metal endoskeleton that holds together the whole animatronic.

He is connected with metallic pipes to a humanlike skeleton. He has usable hands and feet and a small head with eyes and teeth. He doesn’t have a complex design, and I don’t appreciate how basic he looks. That’s why I appreciate Endo-02 more than Endo-01. I think he overall looks better.



Endo-02 is an endoskeleton that made its debut appearance in Five Nights at Freddy’s 2 as one of the secret characters you can encounter during the game.

He appeared for the first time in Five Nights at Freddy’s 2, not as a background character like Endo-01, but as a real threat. As a result, there are rare chances that you can find him in the Prize Corner while the Marionette is out of her box, and surprisingly enough, you can also spot him in the left air vent on the cameras.

He later made an appearance in FNAF World as one of the playable characters and antagonists that you must beat at a certain point in the game.

He also appears as an Easter egg in Five Nights at Freddy’s: Help Wanted that you can encounter just like Endo-01. Upon starting one of the FNAF 2 game modes, there is a chance that he will appear in your office, just like when he appeared in Five Nights at Freddy’s 2 in the Prize Corner.

He is fortunately harmless, and the developers at Steel Wool Studios really went into detail when they were designing his 3D model.

Endo-02’s final appearance is in Five Nights at Freddy’s: Security Breach, where he appears as a cameo character that serves as part of the animatronic amalgamation The Blob. That was the last time we got to see him in the series.

He also made an appearance in the FNAF novel Five Nights at Freddy’s: The Silver Eyes. He is portrayed as Henry’s Suicide Bot, an animatronic which helps Henry Emily one of the cofounders of the Freddy Fazbear franchise- commit suicide.

This is a really interesting feature, and I wish that there were more appearances like this one.


Endo-02 is an endoskeleton inhibited by all animatronics from Five Nights at Freddy’s 2. He is a metallic skeleton that holds most of the Withered and Toy animatronics.

Unlike Endo-01, he has much more details present on his body, and one of the most remarkable differences is his new ears. He is connected with metallic pipes that now seem to have some sort of springs and other types of mechanics around them. For these reasons, Endo-02 is one of my favorite endoskeletons.

Nightmare Endo

Nightmare Endo

Nightmare Endo is an endoskeleton that made its official debut appearance in the fourth installment of Five Nights at Freddy’s. Still, we never got to see him physically appear in the game until later in the series. In Five Nights at Freddy’s 4, he is only present as a cameo character that is present only under the Nightmare animatronics.

He wasn’t seen in a physical form until the release of Five Nights at Freddy’s VR: Help Wanted, where he is featured as an Easter egg that you can encounter during the game. As a result, he is much rarer than the last two Endos that I covered.

Nightmare Endo appears during the Ennard vent repair game mode, where he is standing under the grill you are standing on. He also appears in the extras gallery, which you unlock upon finishing the Pizza Party blacklight level.

Nightmare Endo is an endoskeleton that looks more sturdy and rusty than the others. He is much larger, and he has really big sharp claws. His entire body looks more complex, and his chest is better formed than the other Endos. His head is bigger, and he has a huge jaw with very sharp teeth coming out of it. He has bright red eyes and big ears like Endo-02.

Nightmare Endo would be scary in the real game. I wonder what his jumpscare would’ve looked like if he was present in Five Nights at Freddy’s 4.



Yenndo is an endoskeleton introduced in Five Nights at Freddy’s: Sister Location as a minor antagonist and Easter egg. When you are in the Funtime Auditorium, and when you flash the light with your beacon, there is a rare chance that you may end up seeing him instead of Funtime Foxy. If you try to approach him, you will get jumpscared.

Later in FNAF: Sister Location, Yenndo appears during the Custom Night game mode, where he is one of the selectable antagonists. He will suddenly appear in your office right in front of you, and you must pull up the cameras to make him go away unless you want to get jumpscared by him, ending the night as a result.

Yenndo is an endoskeleton presumably made for Funtime Freddy by how he looks. He doesn’t look like he could fit in other Funtime animatronics, and he even has Freddy’s ears.

Yenndo is one of the largest and most likely the widest endoskeleton. However, he seems like he is an animatronic rather than an endoskeleton. Dozens of metallic wires fully form his entire body. I don’t know why but I find him to be really scary just to look at. He’s done very well horror-wise.

Glamrock Endo

Glamrock Endo

Glamrock Endo is an endoskeleton that made his debut appearance in the most recent FNAF game – Five Nights at Freddy’s: Security Breach. Multiple Glamrock Endos appear in the game, and almost all of them are hostile to you – Gregory, the main character. They can be pretty annoying at times, and you should avoid them at all costs.

They only move when you don’t look at them, which is really creepy game mechanic that could’ve been used for a much scarier animatronic. Glamrock Endo is an endoskeleton that inhibits all Glamrock animatronics. He is by far the most complex endoskeleton out of all. His build is even larger and more complicated than Nightmare Endo.

He seems much more robotic than the rest of the endoskeletons that I covered. However, he is completely modernized with a much cleaner, better body. In my opinion, Glamrock Endo is similar to Nightmare Endo.

Extra Types


Mendo fnaf

Mendo is an endoskeleton that appeared in one of the non-cannon Five Nights at Freddy’s games – FNAF World. He is exclusive to that game. Mendo in FNAF World is one of the three shop owners. He is the owner of Mendo’s Endo-Upgrades, located just at the player’s spawn point.

He sells significant body upgrades which boost your defense in the game during combat:

  • Reinforced – 250 Tokens
  • Steel – 1500 Tokens
  • Titanium – 9000 Tokens

Mendo only appeared in the FNAF World format, so we never got to see how he would look outside that game. He is an endoskeleton that looks similar to Endo-01, and his body is completely blue. He has large hands and a polished body, with a green button on his chest. Mendo has a bright smile, bright yellow eyes, and a yellow antenna. The colors used on him are very well placed. He is just so satisfying to look at.

I was upset that he didn’t make any new appearances in later Five Nights at Freddy’s games. However, some FNAF World animatronics and street vendors like Lolbit and Dee-Dee made it further into the franchise. I like how he looks, and I think I could’ve been used for something interesting.



Endoplush is an endoskeleton introduced in a non-canon Five Nights at Freddy’s game – FNAF World, as one of the playable characters and antagonists you would have to encounter at some point in the game. He is an exclusive character to the FNAF World, as he never officially appeared anywhere outside of it. He has a cameo appearance as an endoskeleton of Plushtrap, but we never really got to officially see him.

Endoplush is a useful character in FNAF World, as he has abilities like Neon Wall and Eye Beam that are important for your playthrough during the beginning. He is a plushie version of Endo-01. However, he is two times shorter and smaller than him. Other than that, nothing else differentiates him from the rest of the endoskeletons.

Mad Endo

mad endo

Mad Endo is one of the endoskeletons who appeared in one of the few non-canon Five Nights at Freddy’s games – FNAF World. He was present as one of the bosses that you have to beat during the game.

Mad Endo appeared for the first and last time in FNAF World. He guards multiple chests that contain chip upgrades that give certain benefits. He is one of the few optional bosses, meaning that you don’t have to defeat him to finish the game.

Mad Endo is a giant version of the regular Endo-01 endoskeleton. However, he has a big body and a much bigger head with dark yellow eyes. I’m more of a fan of one of his counterparts, but still, he is not that bad as a character.



Overclock is one of the endoskeletons introduced in FNAF World. He is one of the bosses who guards one of the buttons that unlock the door to Security the final boss in the game. Overclock is almost the same as Mad Endo. They both look the same and act the same, but Overclock is the fastest enemy in the game, and he is much tougher than Mad Endo.

Some people say that they are slightly different from one another. The alleged fact is that Overclock’s animation is much faster than Mad Endo’s, and that he has a more angry facial expression than Mad Endo, but that is just not true if you take a better look at it.

I’m not a fan of how they share the same models. They don’t have any differences, and there is nothing that makes him unique.

Gold Endo

gold endo

Gold Endo is one of the endoskeletons that made a debut appearance in FNAF World. He is one of the secret bosses you can encounter while playing the game. If you spend too much time at the Pinwheel Funhouse, there is a high possibility that he will attack you out of nowhere. He can even come up to you if you are not moving.

He is not that difficult to beat, and you are probably much stronger than him by the time you are there. The greatest part about Gold Endo is that he will drop you at least 500 tokens which is an incredible amount of money.

Gold Endo shares the same model as Mad Endo, but unlike Overclock, there are many changes made to him. Firstly, Gold Endo is entirely covered in shiny gold, and secondly, he has white dotted eyes that look like the ones found on Springtrap.

I like how he looks, but I’m let down by the fact that this is the first and last game where he appeared.


Question: Can an Endoskeleton Hurt You in the Game?

Answer: The majority of endoskeletons can’t, only one of them is capable of jumpscaring you, and that is Yenndo. If we don’t count the endoskeleton enemies from non-canon FNAF World, he is the only one who can harm you in the game.

Question: Do Endoskeleton Plushies Exist?

Answer: Unfortunately, they don’t. Currently, there aren’t any endoskeleton plushies available on the market, especially not by Funko. But I would really want to see any of these endoskeletons in the form of a real-life plushie. I think that it would be a great idea for Funko.

Question: Is there a Rockstar Endoskeleton?

Answer: The Rockstar animatronics certainly have different endoskeletons from what I’ve mentioned so far. But there haven’t been any official physical appearances of their endoskeleton in the FNAF games.

FNAF Endoskeleton Guide: Conclusion

Five Nights at Freddy’s offers unforgettable animatronics with even more remarkable characters underneath them. I’ve enjoyed some of the endoskeletons more than I should’ve, especially characters like Mendo and Gold Endo, which have never made it from the game where they appeared for the first time.

I would love to see those forgotten characters get included somehow in the new additions to the franchise. For example, they are certainly interesting, Endo-02, who made his mysterious appearance in Five Nights at Freddy’s 2 that hasn’t been resolved.

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