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Minecraft: Java Edition
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Update Log
This update includes a large number of new features and improvements, mainly divided into three major parts:
1. Command System Updates
Boss Pool System Added
A new Boss Pool system has been added.
After creating a datapack, players can now use commands to summon Bosses at fixed locations. You can create a spawn point and manage it through commands, including:
- Adding a spawn point
- Removing a spawn point
- Setting which Bosses can spawn there
- Setting the respawn time
- Setting the spawn weight for each Boss
This allows players to create their own custom Boss farming areas or Boss arenas with much greater freedom.
2. Battle Mode Updates
Boss battles are no longer limited to the traditional 1v1 format.
Players can now define battle modes through datapacks. The following battle modes are currently supported:
- 6v1
- 5v1
- 4v1
- 3v1
- 2v1
This makes Boss battles much more flexible and allows for more challenging team-based encounters.
3. Battle Mechanic Updates
Custom Battle Stats
To raise both the upper and lower limits of Boss strength, a new Custom Battle Stats system has been added.
Through datapacks, players can now customize the Boss Pokémon’s six main stats, including:
- HP
- Attack
- Defense
- Special Attack
- Special Defense
- Speed
This makes it possible to create Bosses with fully customized strength levels and difficulty.
HP Phase Skill Switching
A new HP phase-based skill switching mechanic has been added.
Players can now define different skill sets for different Boss HP stages through datapacks. For example:
- Default skill set
- 90% HP skill set
- 80% HP skill set
- 70% HP skill set
- 60% HP skill set
When the Boss enters a specific HP range, its skills will automatically switch to the skill set configured for that phase.
For example, when the Boss’s HP drops below 90% and enters the next phase, its moveset will switch from the default set to the 90% HP phase set.
This greatly increases the Boss’s coverage and battle variety.
Note: Each time the Boss switches to a new skill phase, its moves will be refreshed once.
Boss Action Count Per Turn
Because battle modes such as 6v1 make single-action Bosses too weak, a new Boss action count mechanic has been added.
Players can now define how many times a Boss can act per turn in each battle mode through datapacks.
However, there is one limitation:
The Boss’s maximum number of actions cannot exceed the number of Pokémon on the opposing team.
For example:
- In 6v1, the maximum Boss action count is 6
- In 2v1, the maximum Boss action count is 2
It cannot be increased beyond that limit.
4. Additional Updates
Besides the three major systems above, this update also includes several smaller but important improvements:
Optional Time, Location, and Biome Fields
Time, location, and biome are no longer required fields in the datapack configuration.
This makes Boss configuration much more flexible.
New All-Time Spawn Field
An all-time field has been added, allowing Bosses to spawn at any time of day.
Reward Commands Added
You can now define rewards through commands.
For example, defeating a Boss can now reward players with:
- A specific Pokémon
- Custom command-based rewards
Punishment Commands Added
Punishments can now also be defined through commands.
For example, if a player runs away from a Boss battle, they can receive:
- Negative status effects
- Custom level reduction penalties
- Effort Value (EV) reduction penalties
- Individual Value (IV) reduction penalties
Dynamic and Fixed Rewards
The reward system now supports both:
- Dynamic rewards
- Fixed rewards
Dynamic and Fixed Punishments
The punishment system now supports both:
- Dynamic punishments
- Fixed punishments
Two New Dynamic Level Generation Methods
Two new dynamic Boss level generation methods have been added:
- Generate the Boss level based on the player’s Pokémon
- Generate the Boss level based on the highest-level Pokémon in the player’s team, according to a custom configuration
This makes Boss difficulty scale more naturally with player progression.
Summary
This update significantly expands the Boss system’s flexibility, depth, and customization.
The main improvements focus on:
- Command-based Boss management
- Multiple battle modes
- Richer battle mechanics
- More flexible reward and punishment systems
- Smarter dynamic level generation
Whether you want to create fixed Boss spawn areas, custom Boss arenas, or challenging team-based Boss encounters, this update provides much more complete support.
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ReleaseVersion number
5.0Loaders
Game versions
1.21.1Environment
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735Publication date
March 22, 2026 at 1:45 AMPublisher

RainApricot
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