Moar Apples
For Minecraft 1.15 to 1.21.5

• Spectator Apple:
  The Spectator Apple, when eaten, puts you in spectator mode for 10 seconds. Once the 10 seconds are up, you will be placed back to your original location.
  
  
• Enchanted Spectator Apple:
  An upgraded Spectator Apple, this one will not return you to where you ate it, allowing you to essentially "teleport".
  
  
• Rotten Apple:
  The Rotten Apple can be "fed" (dropped, not actually fed) to a horse to turn it into a zombie horse. All of the relevant data about the horse will be transferred to the zombie version, which includes stats, names, the saddle and armor, and more.
  
  
• Poison Apple:
  The Poison Apple curses you with a permanent slow poison that will damage you every 10 seconds. This effect can be transferred to another entity or player by punching them. It can only be transferred once, making this an interesting troll item.
  
  
• Apple i-Block:
  The Apple i-Block is a music-playing device. It can play all the music disc in the game. Right-Click to play a song, shift-right-click to play the next song!
  
  
• Glowstone Apple:
  Makes you glow for a couple of minutes.
  
  
• Nether Apple:
  Leaves a trail of fire behind you while giving fire resistance.
  
  
• Potato Apple:
  Instantly heals you some health.
  
  
• Slime Apple:
  Makes you not take fall damage for a bit.
  
  
• TNT Apple:
  Causes a big explosion.
  
  
• Bone-Apple-Tea:
  Converts horses into skeleton horses if you drop it on the ground near them.
  
  
• Crying Obsidian Apple:
  Converts lava into obsidian so you can walk over it. Turns back into lava after a short time.
  
  
• Egg Apple:
  Makes you lay eggs like a chicken for a while... idk why this is a thing either.
  
  
• Flare Apple:
  Shoots a giant firework into the air causing a big explosion of colors :D
  
  
• Trapple:
  Looks very similar to a regular apple, but deals massive damage to the person that eats it.