To obtain a save file with all 649 Pokémon (the full National Pokédex for Generation 5), you can either download a pre-made save file or use a save editor to modify your own. Pre-made Save Files
Obtaining a Pokémon White 2 save file with all 649 Pokémon is the fastest way to experience the full breadth of the Unova saga's massive roster. Whether you are using it for research, competitive team building, or simply to relive the era of the complete National Dex, the file serves as a time capsule of the last generation before the franchise moved fully into 3D.
If you can’t find a trusted file:
If you use a save file with all 649 Pokémon that are legally constructed (valid PID, encounter location, level met), Poké Transporter will accept them. Many community saves are designed specifically for this purpose.