Animal Hospital Anomaly Roblox – Update Ghost and Secret Room Guide

The Anomaly update is focused on three things players are chasing right now: the new Ghost, the new class skins, and the hidden Room 5 compartment tied to Rattu and Ratina. This is not a full every-anomaly guide; it is a focused breakdown of what changed in this update and what still needs more in-game testing.

Anomaly update additions in Animal Hospital

The update adds visible content you can check right away, like new skins in the Classes menu, and less obvious content that requires investigation, like Rattu’s conversations and the hidden lock in Room 5. The Ghost is the main gameplay addition because it behaves less like a simple event and more like an entity moving through the hospital.

There is also a balance-side change: the infinite charge bug has been fixed. That matters more now because players are still figuring out whether the Ghost can be safely handled with charged items such as the taser.

New class skins in the Anomaly update

You can check the new cosmetics from the Classes menu by opening the Skins tab at the top of the screen. The update favors hospital staff and security-flavored classes this time, while Secret, Doctor, Surgeon, and Paramedic did not receive new skins.

How the Ghost anomaly behaves

The Ghost is the update’s biggest gameplay change. It can open and close doors, interact with objects, and move through the hospital in a way that makes it feel more active than a standard hazard trigger.

Its visibility is also part of the danger. Early reports describe the Ghost as a translucent figure that can shift between visible and invisible states, and some players say ectoplasm on the floor can act as a warning sign. Treat that ectoplasm detail as reported behavior rather than a guaranteed rule for every run.

The sanity danger is real, but the exact number is not fully settled. One reported run showed the Ghost draining two sanity on contact, while broader testing has not locked down exact sanity-loss values, despawn timing, or any reward modifier for removing it.

Ghost counters that work or remain disputed

The cleanest reported counter is the taser: using it on the Ghost makes the anomaly disappear, and one reported result suggests the taser may not lose charge when used this way. Because the update also fixed an infinite charge bug, that charge behavior needs more testing before players treat it as a permanent mechanic.

There are also reports that the gun can remove the Ghost if fired from behind while the Ghost is visible, and that active fire can knock it unconscious if lured into contact. Those methods are not as firmly established as the taser result and may carry sanity risk, especially if you get cornered while trying to set up the lure.

Rattu’s key and the hidden Room 5 compartment

How to unlock the secret Room 5 compartment in Animal Hospital

Keep talking to Rattu

Speak to Rattu through multiple conversations until he opens up about his past.

Learn about Ratina

Rattu tells you his missing sister, Ratina, worked for Animal Hospital Corporation before disappearing.

Receive Rattu’s key

After enough conversations, Rattu gives you a mysterious key and a doctor’s note tied to it.

Go to Room 5

Take the key to Room 5 once the secret begins.

Find the cat poster

Look for the cat poster hanging on the wall in Room 5.

Remove the poster

Pull away the poster to reveal the hidden lock behind it.

Use the key on the lock

Use Rattu’s key to open the hidden compartment.

Inspect Ratina’s photo

Check the compartment for Ratina’s photograph.

Read the experiment documents

Look through the documents connected to the hospital’s experiments.

Note the shadow message

One note says the experiment succeeded and that the shadow now sees everything.

The Room 5 route is the most specific secret sequence in the update: Rattu conversations, then key, then cat poster, then hidden lock. Still, treat broader claims about a larger secret room or separate Ghost-linked room as unverified unless you reproduce them in-game, because major written routes are not yet consistent on a separate entrance, trigger, or coordinate-based method.

Video help

Ratina and the shadow lore

Rattu’s story gives the update its strongest lore hook. He says Ratina, his missing sister, worked for the Animal Hospital Corporation before disappearing without a clear explanation.

The Room 5 compartment connects that disappearance to the hospital’s experiments. Inside, the reported finds include a photo of Ratina and documents tied to mysterious testing inside the hospital.

The most important line is the note saying, “The experiment was a success. The shadow now sees everything.” That strongly points toward Ratina’s disappearance being connected to the hospital’s hidden experiments, but it does not confirm what the shadow is, whether the Ghost is related to it, or whether Ratina is alive.

Infinite charge fix in the Anomaly update

The update also fixes the infinite charge bug, which previously let players use unlimited charges during gameplay. That is a balance change, but it lands differently now because the Ghost has players testing charged counterplay items.

If the taser truly removes the Ghost without consuming charge, that may be a special Ghost interaction rather than the old bug returning. Until more runs confirm it, assume the broader unlimited-charge exploit is gone and manage item use normally.

Common Ghost and Room 5 mistakes

The easiest mistake is treating every Ghost claim as equally confirmed. The Ghost does appear to be dangerous, and the taser appears to be the most reliable answer, but extinguisher behavior, behind-only hit rules, Shift 3 item access, and secret-room wording still have unresolved parts.