/summon Endermite ~ ~1 ~ {CustomName:"Gusano Mortal",CustomNameVisible:1,Equipment:[{},{id:diamond_boots,Count:1,tag:{AttributeModifiers:[{AttributeName:"generic.maxHealth",Name:"generic.maxHealth",Amount:4,Operation:0,UUIDLeast:637726,UUIDMost:446080,Slot:"feet"}],Unbreakable:1,display:{Name:"Botas Del Gusano Mortal"},ench:[{id:0,lvl:50},{id:1,lvl:3}]}},{id:diamond_leggings,Count:1,tag:{AttributeModifiers:[{AttributeName:"generic.maxHealth",Name:"generic.maxHealth",Amount:4,Operation:0,UUIDLeast:926085,UUIDMost:161232,Slot:"legs"}],Unbreakable:1,display:{Name:"Pantalones Del Gusano Mortal"},ench:[{id:0,lvl:50},{id:1,lvl:3}]}},{id:diamond_chestplate,Count:1,tag:{AttributeModifiers:[{AttributeName:"generic.maxHealth",Name:"generic.maxHealth",Amount:4,Operation:0,UUIDLeast:90615,UUIDMost:736023,Slot:"torso"}],Unbreakable:1,display:{Name:"Pechera Del Gusano Mortal"},ench:[{id:0,lvl:50},{id:1,lvl:3}]}},{id:diamond_helmet,Count:1,tag:{AttributeModifiers:[{AttributeName:"generic.maxHealth",Name:"generic.maxHealth",Amount:4,Operation:0,UUIDLeast:562626,UUIDMost:108009,Slot:"head"}],Unbreakable:1,display:{Name:"Casco Del Gusano Mortal"},ench:[{id:0,lvl:50},{id:1,lvl:3}]}}],DropChances:[0.085F,0.085F,2.0F,2.0F,2.0F],Attributes:[{Name:generic.maxHealth,Base:180},{Name:generic.movementSpeed,Base:0,1},{Name:generic.attackDamage,Base:6},{Name:generic.followRange,Base:10000},{Name:generic.knockbackResistance,Base:1}],HealF:180,Silent:1,Riding:{id:"Enderman",CustomName:"The End Is Here",CustomNameVisible:1,Attributes:[{Name:generic.maxHealth,Base:2}],HealF:2,ActiveEffects:[{Id:20,Amplifier:1,Duration:200000}]}}
Media hora para eso ._. Ojala funcione XD
/setblock ~ ~1 ~ mob_spawner 0 replace {SpawnCount:10,MaxNearbyEntities:50,SpawnRange:3,Delay:20,MinSpawnDelay:20,MaxSpawnDelay:260,RequiredPlayerRange:14,EntityId:Zombie,SpawnData:{id:Zombie,CustomName:"Zombie De La Orda",CustomNameVisible:1,Attributes:[{Name:"generic.movementSpeed",Base:0.4f},{Name:"generic.attackDamage",Base:6},{Name:"zombie.spawnReinforcements",Base:1f}]}}