UPD 1.5.1: Added the leash feature

Happy Ghast

This mod introduces friendly Ghast companions inspired by the Live features.

Core Features:

• Friendly Mobs: Adds the peaceful, rideable Happy Ghast and its baby form, the Ghastling. They won't attack players and don't despawn. Iron Golems, Snow Golems, and Guard Villagers will not target them.
• Ghastling Growth:
  • Find Dried Ghasts generating near Nether Fossils (in various Nether biomes).
  • Waterlog a dried ghasts to start hatching (takes about 1 in-game day). The incubator shows visual stages (Dried, Neutral, Happy).
  • Use Ghast Tears on a waterlogged dried ghast to speed up hatching.
  • Right-click a dried ghast with a Stick to check progress.
  • Feed hatched Ghastlings snowballs to heal them and significantly speed up their growth into a Happy Ghast.
• Riding & Transport:
  • Equip adult Happy Ghasts with a harness (found or crafted) to ride them.
  • Control flight with Space (ascend) and C (descend).
  • Ride with friends: Happy Ghasts can carry up to 4 players.
  • Adjust flight speed using the /ghastspeed <multiplier|reset> command (requires permissions).
• Customization:
  • Use standard colored harnesses, dye them, or remove them with shears.
  • Create custom harnesses (single-player only via /ghast createharness command and GUI). Add your own 2:1 ratio textures for saddles, glasses, and accessories to the happyghast_textures folder.
• Other:
  • Includes spawn eggs for both mobs.
  • Features custom sounds for Ghasts, Ghastlings, and the incubator.
  • Extended interaction range for easier mounting.

Compatibility:

• Minecraft 1.19.2 (Forge)
• Minecraft 1.20.1 (Forge)
• Minecraft 1.21.1 (NeoForge)

If you have found a bug, please let me know about it. 
Discord https://discord.gg/VQ9S8mpjgb