Make sure you read this. Name it JakeTheDog then tame it!
Achtung: Minifiziere den Command um Probleme zu vermeiden :)
Best command ever!
Get my head
Summon JakeTheDog!
Normal pokeball
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)