Pokédex
An encyclopedia within Pokémon games that records information about the Pokémon a Trainer encounters or catches.

Context
Depending on the game, the Pokédex can be a dedicated device, a phone application, or an interface for a research record. Entries can include a Pokémon’s number, type, appearance, and descriptive information.
Regional Pokédexes organize the Pokémon relevant to a particular region or adventure. The official Pokémon website also offers a searchable Pokédex.