This is a tool datapack that adds customizable PNG monster mobs. You can do this by applying your own texture. This datapack has 10 mobs that you can use or customize.

This does not need optifine.
Please give credit when used.
This won't work in 1.19.3

• Normal and Super PNG Chasers

There are normal and super ones. Both can open doors. The normal ones have some strength, some speed, some knock back resistance, and some jump boost.

The super variants can walk fast on water and have stronger stats than the normal ones. For example, normal ones have 64 hearts while super ones have 125.

• Natural Spawning

They can spawn for every 5 creepers that are below y=0. There is a cycle of spawning. The first 2 that spawns would be normal, while the third is a super variant. This repeats.

• Control Book

You can use the control book to get the spawns and toggle some natural spawning settings. You can get this book by typing the “/reload” command and clicking the text in chat that will give you the book.

• Applying Textures

To apply your own texture, you need to go into the resource pack folder, then the assets folder, then the minecraft folder, next is the textures folder, last is the pngc_texture folder. Inside this folder, you will see the textures.

Just replace the textures there with your own, and make sure to rename your new textures to the original ones you replaced. You will see it work when you reload the resource pack.

Make sure that your image is a png and a square (I recommend it to be 48 by 48 pixels, but other sizes should work).

• Some Lore For Fun
  

A spatial rift was found by a mysterious organization, and they caught glimpses of a monster-filled dimension. After conducting an extensive investigation, they were able to build a small gateway that can move objects between the dimensions.

They capture powerful creatures from their native habitat and transport them to their location. They tried to experiment on these creatures in order to tame them so they could use them as weapons, but no matter what they did, the monsters always came out as living "images" of themselves. The monsters can only make simple attacks in this form because their abilities have been stripped.

Unsatisfied with the results, the mysterious organization uses a device to dispose of the monsters. They don’t know that the device just sends the monsters to a far away world, which is the world that the player is in.