This mod works with the Farewell to Arms update.

Mini Bosses (Fuselier, Shadow Magician and Ghost Blockner) have boss health bars. Also works for modded bosses if they are flagged as a mini boss (subboss in the code).

I gave Shadow Magician and Ghost Blockner a horizontal health bar, while Fuselier and modded mini bosses will have vertical health bars.

This is a companion mod to the popular Health Bars That Work by Kyle.

Other quality of life mods I made:

• AutoReload
• AutoConsole
• Skip Intro And Main Menu
• Shrine Descriptions
• Blank And Active Item Reminder
• Teleporters Everywhere

Installation
Get MTG:

• Download Mod the Gungeon at: http://modthegungeon.eu/#download
  
• Make sure Enter the Gungeon is closed
  
• Open ETGMod.Installer.exe and press "Step 3: Install ETGMod"
  
• Close dat thang
  

Installing mods:

• Go to your Enter the Gungeon Steam directory, usually located at:
  "C:\Program Files (x86)\Steam\steamapps\common\Enter the Gungeon\"
  
• If there is not one already, create a folder called "Mods"
  
• Drag MiniBossHealthBars.zip into the Mods folder
  
• If there is a "mods.txt" file in the Mods folder, delete it
  
• The directory should look like this: "Enter The Gungeon/Mods/MiniBossHealthBars.zip"
  

Then launch the game. If Mod the Gungeon installed correctly, you can press F1 to see the list of active mods.  Source Code: https://github.com/Goldenrevolver/Enter-The-Gungeon-Mods/ .