How to use Minecraft Gaster in Underfell skin ?

Learn how to download and apply the Gaster in Underfell skin for Minecraft on PC (Java Edition) or Pocket Edition (PE).
PC (Java Edition):

1. Go to the Minecraft website and login to your account.
2. Click the “Minecraft Java Edition” dropdown menu and select “change skin”.
3. On the next page, click “select file” and upload the Gaster in Underfell skin file.

1. Open the game app and press the “dressing room” button on the main menu screen.
2. Press “Edit Character” -> “owned skins” -> “choose new skin” and upload the Gaster in Underfell skin file.

Does this skin have thick or skinny arms?

This particular Gaster in Underfell skin has thick (4px) arms. It is based on the classic Steve model.

What color is this Gaster in Underfell skin skin?

This particular Minecraft Gaster in Underfell skin has the following color palette:
Black
Mine Shaft
Silver
Alto
Black