allthemons-0.1.4.jar is a release file of the Minecraft mod All The Mons - Coremod (this is not the modpack you are looking for) for NeoForge, made for Minecraft 1.21.1. It was published on April 20, 2026 and is 26.4 MB in size. For the full description, screenshots and every other version, visit the All The Mons - Coremod (this is not the modpack you are looking for) mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.