Mysterious_pug Models.zip is a release file of the Minecraft resource pack Mysterious_Pugs Amazing 3D Models, made for Minecraft 1.12. It was published on April 2, 2019 and is 0.9 MB in size. For the full description, screenshots and every other version, visit the Mysterious_Pugs Amazing 3D Models resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.