How to use the minecraft 1.9 "Passengers" tag?

I was wondering how to use the new 1.9 stacking tag, which i believe goes like this:

/summon Chicken ~ ~ ~ {Passengers:[{id:"Slime"­}]}`

I am wondering how to use this to give players colored leather armor that's "riding" each other, so that pushing on button gives a player a full set of colored armor. Any help would be appreciated thanks!

2 Answers

Since Passengers is a list, you separate each rider (the slime) of the root entity (the chicken) with a comma. This differs from Riding in that each rider is not required to ride one another, though it is still possible by including Passengers with each rider.

The following would summon a pair of leather boots as the root entity, that had 3 other riders at the same depth:

/summon Item ~ ~1 ~ {Item:{id:"minecraft:leather_boots",Count:1},Passengers:[{id:"Item",Item:{id:"minecraft:leather_leggings",Count:1}},{id:"Item",Item:{id:"minecraft:leather_chestplate",Count:1}},{id:"Item",Item:{id:"minecraft:leather_helmet",Count:1}}]}

If you want them nested further, similar to a Riding stack, you'll have to add Passengers to the rider:

/summon Item ~ ~1 ~ {Item:{id:"minecraft:leather_boots",Count:1},Passengers:[{id:"Item",Item:{id:"minecraft:leather_leggings",Count:1},Passengers:[{id:"Item",Item:{id:"minecraft:leather_chestplate",Count:1},Passengers:[{id:"Item",Item:{id:"minecraft:leather_helmet",Count:1}}]}]}]}

I suggest you to use McStacker selecting as Minecraft version 1.9 Snapshots