Starting off with a favorite of mine, Reunion Capes are a highly useful item! They are an item that can be "connected" to another Pokemon by tapping the bow of the Reunion cape while touching another Pokemon, and when you tap the bow of the Reunion Cape while wearing it and aren't touching another Pokemon, you'll be teleported to the Pokemon it was connected to! No matter the distance, no matter how far apart you are, you'll be reunited.
Not that this has any relevance to anyone reading this, but Vernir of Team Gardeners has confirmed that it even works across worlds, so its range seems truly limitless.
However, that's not without its cost: Compared to many other items, they're rather difficult to create, requiring quite a few other items to create it. I'm here to guide you through it, though! I believe in you! Though if you don't feel up to it yet, feel free to read some of the other entries of this guide first, then come back here.
You will need: 1 Guiding wand, 1 Pounce wand, 1 Warp wand, orb, or seed, 1 Rollcall orb, 1 Friend bow, 5 strands of shed Sylveon, Espeon, or Meowstic fur, and depending on your size, 0.01 square meters to 10 square meters of Wooloo cloth. Optionally, also 1 Connection orb and colored dye of your choice.
The instability of Eevee fur is needed, alongside psychic or fairy type energy. Meowstic ear fur is close enough in composition to Espeon fur to also be able to be used.
A stayaway wand can be used as a substitute for another warping item if necessary, but I do not recommend doing so. It'll temporarily petrify you every time you use the Reunion Cape.
First, grind the guiding wand, pounce wand, warp item, and rollcall orb into a fine powder. You may also add in a connection orb to the mix for an indicator of whenever you successfully connected your reunion cape to someone, and for a smoother journey when using your Reunion Cape.
Cover the Wooloo cloth in this powder. Let it sit overnight to allow the powder to ingrain within the cloth.
In the morning, brush a vine, paw, hoof, hand, tail, wing, or other limb across the Reunion Cape. If any powder sticks to you, it's not ready yet. If this is the case, let it sit until evening before moving onto the next step. Otherwise, move on to the next step now.
Now, cut the the cloth so that there's a V-shaped indentation on one side, a hole about a third the size of the cloth at the point of that V-shaped indentation, and circular frills around the other sides of the cloth. The frills aren't needed, but they do look nice. You're able to leave them out if you want, though.
Now, take the friend bow and five strands of fur, and use them to sew the friend bow into the point of the V-shaped indentation. You can use more strands if you want, but you need at least five. If you're worried about the bow falling off, don't be. The instability of the Sylveon, Espeon, or Meowstic fur causes it to react slightly with the powder on the fur, and cause a small chemical reaction that glues the bow to the cloth. This is why we needed that fur specifically.
Now, just dye the cape whatever colors your fashion sense desires, and voila! You've created yourself a Reunion Cape!
A bit of trivia: Reunion Capes were first invented about 800 years ago, during the second Sand War. Soldiers needed a way to quickly retreat back to their generals without leaving the battlefield entirely via an escape orb, and not all needed to retreat at once, as a rollcall orb would do. Legend has it that the leader of one army woke up one day struck by inspiration, and created the first Reunion Cape in a frenzy, though they were called "Retreat Capes" back then. After the war ended, they gradually came into common use, and are now commonplace today!
The reason why most reunion capes today are red is because of that war. They were dyed red to blend in with the volcanic terrain that many of the battles during that war were fought in.
Reunion Capes are a popular way of traveling long distances quickly. Around the Mist, Air, and Grass continents, there's a service that allows you to temporarily rent out reunion capes tethered to people in important places. I myself have used that service a number of times, and it's really useful! Doesn't beat using a Teleport Gem, but it's still a great way to get around.
And that's all I have for Reunion Capes! A very useful item with a long history behind it, and while difficult to create, can take you even across worlds!
Next section, I'll be talking about Reviver seeds, Tiny Reviver seeds, Plain seeds, Reviser seeds, and why the latter are sometimes called "Zygarde's Compromise".