Save me Dog!
Note: Minify the command to avoid issues :)
More mobs in 1 command (Read The comments!)
More Mobs: Air Zombies 1.8.7 (Read The comments
Ghostly Horseman (1.9.1)
Red bull 2.0 (Aka Black red bull)
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)