Guess who? It's Nightmare BON-BON!
Note: Minify the command to avoid issues :)
Funtime Foxy Command
Freddy Fazbear Mob by DanTDMFan518
Toy Chica Command
The Diamond Minecart Trader
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)