Costing £1.49 and compatible with the iPhone, iPad, iPad mini, and iPod touch, the official Unova Pokédex contains information on Pokémon 494-647.
Users can browse Pokémon either by name or by Pokédex number, move, ability or type, and will be greeted by a dynamic 360-degree image of the Pokémon, alongside an encyclopedia entry.
The app will inform users about how to evolve a Pokémon, in-game locations where specific Pokémon are found, and which attacks an individual Pokémon is weak against.
Once the Unova app is installed, users can visit the in-app store to download the full National Pokédex, region by region.
Additional regions include Kanto (No. 001-151), Johto (No. 152-251), Hoenn (No. 252-386) and Sinnoh (No. 387-493). Each costs £3.99.
Pokemon Black Version 2 and Pokemon White Version 2 released earlier this year on Nintendo DS, marking the first direct sequels in the long-running series.
> Digital Spy's review of 'Pokemon White Version 2': Evolution, not revolution
Watch the trailer for Pokemon Black 2 and White 2 below: