Dr Trayaurus from DanTDM!
Note: Minify the command to avoid issues :)
Spawn Bomby!
Summon DanTDM!!!!!
A Sword That's Alive!
Pogo Stick!
Pet ENDER DRAGON!!!!!
Wither Storm Boss in ONE COMMAND
HEROBRINE COMMAND
HEROBRINE BOSS BATTLE (See YouTube for details)