Pokemon Parallel Platinum is a 3DS ROM Hack by Zera807 based on Pokemon Alpha Sapphire in English. It was last updated on April 09, 2023.
Also, be sure to check out Pokemon Nightmare Moon.
Now for a small insight into the game’s story. I don’t want to spoil too much, and I’m sure you don’t want to be spoiled either. This also isn’t just going to be your generic Pokémon ROM hack story change, with a few dialogue edits and texture changes. Using a new mapping tool being developed for the Generation 6 games, CTRMap (by Hello007), Pokémon Parallel Platinum will have new maps to discover, including new icy areas and places which may look different than you remember.
To give a brief summary of the story, Dialga and Palkia have had a major upset in the Sinnoh region, and thus have travelled across the world, fighting as they go. Eventually they settle for the sky of Hoenn to be their battleground, and as they both defeat each other, a huge explosion occurs, creating a giant forcefield over the top of the Hoenn region. This is what causes Parallel Pokémon to exist. You’ll have to wait and see for more information later in the future about the story – I don’t want to spoil too much this early on.
If you find a ROM that's encrypted, you need to use the Batch CIA 3DS Decryptor, created by Matif.
Not all games are fully compatible with Citra. If you do find a game that's not working, try using the latest PabloMK7 Citra fork, the continuation of Citra since its shutdown.
Citra is an open-source 3DS emulator for Windows, Mac, Linux and Android devices.
It is designed to recreate the functionality of the Nintendo 3DS system on other platforms, enabling users to play 3DS games in higher resolutions and with improved graphics.