Make sure you read this. Name it JakeTheDog then tame it!
Note: Minify the command to avoid issues :)
Troll your friends with this command!
Summon JakeTheDog!
Get my head
Best command ever!
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)