The iOS PokéDex that Japan got about a month ago is now available in English! It includes all the usual information plus animated 3D images of Pokémon. It’s compatible with many of the newer iOS devices.
Warning: The app is $1.99 and includes only Unova Pokémon. Kanto, Johto, Hoenn, and Sinnoh Pokemon can be added seperately for $5.99 EACH. It is very expensive to have a complete ‘dex. Remember that there are great fan options out there including Serebii’s and Veekun’s.