Pokémon X was released for the Nintendo 3DS on October 12, 2013, alongside its counterpart, Pokémon Y. These games marked the sixth generation of the Pokémon series and introduced numerous new features and enhancements over previous versions.

Key Features: 1. 3D Graphics: Pokémon X, along with Y, was the first main series game to feature fully 3D polygonal graphics, significantly enhancing the visual experience. This change was a major leap from the previous 2D sprites and environments. 2. Mega Evolution: One of the most notable additions was the introduction of Mega Evolution, a temporary transformation that significantly boosts a Pokémon's stats and can provide new abilities or types. This feature added new strategic elements to battles. 3. Fairy Type: The game introduced the Fairy type, a new Pokémon type designed to balance the dominance of Dragon-type Pokémon. Several existing Pokémon were reclassified to the Fairy type, and new Fairy-type Pokémon were introduced.