For those who already know how to do it, just post the following: Then you have to (probably) reiterate this when you're actually about to trade, since you need to have exact timing.. Explained below.   I thought this warrants it's own thread. Why do you want to trade? 1] To get the exclusive Pokémon from the other version if you only bought one version (like a normal person ), listed below: Pokémon: Let's Go, Pikachu! exclusives (Alolan) Sandshrew / (Alolan) Sandslash Oddish / Gloom / @Vileplume2000 Mankey / Primeape Growlithe (Alolan) Grimer / (Alolan) Muk Scyther Pokémon: Let's Go, Eevee! exclusives Ekans / Arbok (Alolan) Vulpix / (Alolan) Ninetales (Alolan) Meowth / Alolan Persian Bellsprout / Weepinbell / Victreebell Koffing / Weezing Pinsir Note that the (Kanto) evolutions of Growlithe and Meowth are actually obtainable in the other versions. More on Alola forms below. 2] To evolve the following Pokémon: Kadrabra > Alakazam Machoke > Machamp (Alolan) Graveler > (Alolan) Golem Haunter > Gengar I found out you can't actually stop these evolution like you normally can (in case you want to trade them back and see the evolution for yourself). 3] To get the Pokémon you didn't choose. You can only get one of either: Omanyte or Kabuto Hitmonlee or Hitmonchan There are two instance in the game where you get a Pokémon, but have to choose between one or the other. You'll have to trade to get the other one. Omanyte and Kabuto can both evolve, keep that in mind. 4] To get Pokémon from the mobile game Pokémon Go if you can't or refuse to play that game. These include the Alola forms, although I'm googling this right now, and apparently most of them are included in-game. The exceptions are (like already noted above): Pokémon: Let's Go, Pikachu! exclusives Alolan Sandshrew / Alolan Sandslash Alolan Grimer / Alolan Muk Pokémon: Let's Go, Eevee! exclusives Alolan Vulpix / Alolan Ninetales Alolan Meowth / Alolan Persian Then of course there are the two actually new Pokémon, introduced in Pokémon Go. Meltan Melmetal If you don't play the mobile game, then the only way to get them so far is to trade for them. Note that you can't evolve a Meltan into Melmetal in Pokémon: Let's Go!, you actually need to do this in a specific (and from what I've heard cumbersome) way in Pokémon Go itself. So without the mobile game, you'll need to trade for both. These last two particularly are a pain, so I hope they'll hand them out as mystery gifts in the future. How do you trade? The process is simple, too simple in fact, making it hard to actually set up trades with people you know. The benefit of it is that you can probably get most of what you want incredibly easily with random people. But the process is as follows: Go into the menu, and select communicate. Nearby for local and Far away for internet obviously. Then form a password by selecting 3 Pokémon icons. The other player has to do the same and match the password. Then you're matched (if the password matches), and then you both select a Pokémon to offer, then confirm. You can repeat this until you cancel the trade. That's it. It doesn't use your friendlist, and doesn't ask for anything else, increasing the chance you end up with random people instead. That's why the timing is important, you'll both need to send the same password at the same time for the biggest chance to actually end up with each other. Also, you are both identified by your character name, so keep that in mind. Fun with random people You can also try to get what you want from random people. Some tips: Just select 3  Pikachu icons. You'll end up with someone right away. You can mix it up with other icons from the top row (or even just totally random icons), if you want more trades with different people. You can see what your trade partner is currently selecting / offering, and vice versa. While you can't communicate what you want, you can let them know what you already have. It's useful to set your Pokébox sorting on first catched. Since your partner Pokémon will then be the first selection, your trade partner will immediately know what version of the game you have, and if it's any use to continue the trade. In my experience most people doing this will have completed the game (or are in late-game at the very least). A few of them were interested in the evolution trades, so keep Kadabras, Machamps, Golems and Haunters ready. Also just try any rarish Pokémon you don't want to use. I traded my Hitmonlee for a Hitmonchan in a random trade. I've also traded a couple of Alola exclusives.