
Yes, you will have to be talking with each other to coordinate a trade together. If you want to trade with a friend online, follow the same instructions listed above, but make sure you both choose "Yes, with a Link Code" and enter the same exact link code. Alternatively, you can interact with someone who has made the Trade call to activate a trade as well.
The other person will need to interact with you to trigger a trade. Once in the Global Room, press Y to bring up a menu. Both of you must choose "Yes, with a Link Code" and enter the same number.
If you want to be paired with a random person, choose "Yes" - if you want to trade with a friend, decide on a Link Code together. Choose "Global Room" for an online trade. Now that you've unlocked the capability for online communication, here's how to trade in Pokemon BDSP. How to Trade in Pokemon Brilliant Diamond and Shining Pearl Once you've spoken to the far-right NPC in the basement, you can now go inside the Union Room from any in-game location (except inside buildings and caves) by pressing the Y button on your Nintendo Switch. Speak to the NPC on the far right in the basement. Go to the basement of any Pokemon Center. To interact with other trainers online, you must do the following: Simply head upstairs and speak with the lady in the center to enter the Union Room, where you can then interact with other trainers. Local Trading is available as soon as you reach your first Pokemon Center in Sandgem Town. These Pokemon are Rotom, Gligar, Gliscor, Nosepass, Probopass, Ralts, Kirlia, Gardevoir, Gallade, Lickitung, Lickilicky, Eevee, Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Leafeon, Glaceon, Swablu, Altaria, Togepi, Togetic, Togekiss, Houndour, Houndoom, Magnemite, Magneton, Magnezone, Tangela, Tangrowth, Yanma, Yanmega, Tropius, Rhyhorn, Rhydon, Rhyperior, Duskull, Dusclops, Dusknoir, Porygon, Porygon2, Porygon-Z, Scyther, Scizor, Elekid, Electabuzz, Electivire, Magby, Magmar, Magmortar, Swinub, Piloswine, Mamoswine, Snorunt, Glalie, Froslass, Absol, and Giratina.Play How to Unlock Trading in Pokemon Brilliant Diamond and Shining Pearl These were added to the main game for the Sinnoh Regional Pokedex.
With Pokemon Platinum meant to combine these games together into one story and experience for what could be considered a definitive one, it does have some of the encounters that would normally be exclusive to either Diamond or Pearl. It also has other Pokemon that were originally only available after the National Pokedex was obtained. For Pokemon Pearl, players had their own exclusive access to Slowpoke, Slowbro, Slowking, Misdreavus, Mismagius, Houndour, Houndoom, Bagon, Shelgon, Salamence, Shieldon, Bastiodon, Glameow, Purugly, Spheal, Sealeo, Walrein, Pinsir, Stantler, and Palkia.