To find the key, you will have to go to the right until you reach the X-ray room and check on the left side to see the board with all the X-ray scans.
One of the X-rays corresponds to a teddy bear with a key, the key you are looking for, but that was at some point, because if you check the bear you will not find it.
You will find it on the rabbit instead, although the stuffed animal in question may change each time, so X-ray the rabbit anyway.
After confirming, you will have to drag the rabbit stuffed animal past the X-ray room to the forklift and into the incinerator. Jump on the handle to turn it on and grab the key when the plush has burned. That's all you have to know about how to get the Little Nightmares II hospital key, we hope you can complete this puzzle quickly and get on with our advice.
Little Nightmares 2
Microsoft Windows PC, PlayStation 4 PS4, Xbox One, Nintendo Switch, PlayStation 5 PS5, Xbox Series X - S, Stadia