/summon minecraft:slime ~ ~1 ~ {Size:0,Passengers:[{id:"minecraft:zombie",CustomName:"Mr. Bubbles",CustomNameVisible:1,FallFlying:1,ArmorItems:[{id:"minecraft:red_flower",Damage:1,Count:1},{id:"minecraft:skull",Damage:2,Count:1},{id:"minecraft:hay_block",Count:1},{id:"minecraft:sticky_piston",Count:1}],Silent:1,HandItems:[{id:"minecraft:hopper",Count:1},{id:"minecraft:fish",Damage:2,Count:1}],ActiveEffects:[{Id:13,Amplifier:0,Duration:2147483647}]}]}