Boss Checklist - Ultris Compatibility
Boss Checklist - Ultris Compatibility adds Ultris boss entries to the Boss Checklist interface, so they appear whether or not Ultris is installed.
What it does
Boss Checklist - Ultris Compatibility fills the Boss Checklist interface with entries for the Ultris bosses. The mod adds placeholder entities that act as the foundation for those entries, and it lists the drops for each boss using stand-in items that cannot be obtained, which mirror the real rewards. An entry is marked defeated automatically once a player earns the advancement tied to that boss.
The mod is bundled as a data pack and is not included with the other Boss Checklist addons, because its placeholder entities are added by the mod itself. Those entries therefore show in the checklist even when Ultris: Boss Expansion is not installed, so a modpack player is not left searching for a boss that cannot be found. Boss Checklist and Ultris: Boss Expansion are both required dependencies.
The mod is server-side only: only the server needs it, and players join without installing it. Files are published for Fabric, Forge, NeoForge and Quilt, all for 1.20.1, with 1.0.4 as the latest build. The code is released under the MIT License and is not open source.
Key features
Ultris boss entries
Entries for the Ultris bosses appear in the Boss Checklist interface alongside the other boss entries.
Placeholder boss entities
Stand-in entities serve as the base the boss checklist entries are built on, without spawning the real bosses.
Replicated drop listings
Each boss entry shows its drops using unobtainable stand-in items that match the real rewards.
Automatic defeat tracking
An entry is marked defeated once the player earns the advancement attributed to defeating that boss.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
How it compares
MemoPad is client-side only and is an MIT-licensed Fabric utility for 1.20.1, so it does not change a server the way this mod does. Scoreboard CheckList is client-side only, MIT licensed and built for Forge 1.16.5, a different game version and a different purpose. Aeronautics Preflight Checklist is for NeoForge 1.21.1 and is licensed as All rights reserved, with a client required and server optional environment.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Boss Checklist - Ultris Compatibility | Fabric, Forge, NeoForge and Quilt | 1.20.1 | Server-side only | 2026-01-16 |
| MemoPad | Fabric | 1.20.1 | Client-side only | 2026-06-14 |
| Scoreboard CheckList | Forge | 1.16.5 | Client-side only | 2026-05-30 |
| Aeronautics Preflight Checklist | NeoForge | 1.21.1 | Client required, server optional | 2026-06-08 |
Questions
Does Boss Checklist - Ultris Compatibility need Boss Checklist?
Does the server need Boss Checklist - Ultris Compatibility?
Do the boss entries work without Ultris installed?
Which loaders are supported?
In the catalog
Boss Checklist - Ultris Compatibility is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 34,764 mods support Minecraft 1.20.1.
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What the author says
This is an addon mod for both Ultris: Boss Expansion and Boss Checklist that integrates all of the former's bosses into the latter's boss checklist interface as entries. "How did you make this work? Ultris is a data pack bundled as a mod!" To begin with, the mod adds fake, unspawnable stand-in entities which act as…
Official listing
- Modrinth page
- modrinth.com/mod/boss-checklist-ultris-compatibility
- Owner
- TheExiIedFeIIow
- Published
- 2025-11-23
- Updated on Modrinth
- 2026-01-16
- Facts verified
- 2026-10-15