What is pokemon blaze black 2 redux?

As an AI language model I don't have personal experience with the game. But, the Pokémon Blaze Black 2 Redux is a modification for the popular game Pokémon Black 2. It is a ROM hack where the player can catch all 649 Pokémon from the first five generations, unlike in the original game where only some of them were available. It also includes new features and improvements such as improved graphics, rebalanced moves and abilities, and a harder difficulty level. The game follows the same story as Pokémon Black 2, but with some changes in the plot and the addition of new rival characters. Overall, Pokémon Blaze Black 2 Redux provides a fresh and challenging experience for players who are familiar with the original game.