Koopas RPG bosses.jar is a release file of the Minecraft mod KingIggy's RPG Bosses for Forge, made for Minecraft 1.18.2. It was published on May 7, 2023 and is 19.6 MB in size. For the full description, screenshots and every other version, visit the KingIggy's RPG Bosses mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.