/summon wolf ~ ~ ~ {CollarColor:9,CustomName:'[{"text":"Elliot"}]',CanPickUpLoot:1b,Invulnerable:1b,Attributes:[{Name:"generic.attack_damage",Base:2048f},{Name:"generic.attack_knockback",Base:0f}]}
/summon zombie ~ ~ ~ {CanBreakDoors:1,CustomName:'[{"text":"Steve"}]',Invulnerable:1b,Attributes:[{Name:"zombie.spawn_reinforcements",Base:100f}]}