Mob Battles

Mob battles addon is an addon that makes users capable of making different mobs fight each other. Even modded or custom entities!
Below is the guide on how to use this addon.
Step 1:
Click (ATTACK) an entity with a team item (Green, Blue, or Red Team). That hit entity will join the team that the item in the main hand refers to. Image Instruction (using Red Team to add entity in Team Red):
Step 2:
Click (ATTACK) with a Team item on the other entity. The hit entity will join the team based on your item (e.g., hitting an entity with Blue Team to make it join Blue Team). Image Instruction:
Step 3:
Right click with the Start fight item to begin the battle. Image Instruction:
NOTE: Mobs won't fight if they are too far from each other.