Unova Red is a re-imagining of Generation 1, but using the Pokedex from Generation 5. This is because the Unova Pokedex was designed to stand alone without any Pokemon from additional regions, much like the original Pokedex. The plot is effectively identical to the Generation 1 games, the only major change is in the Pokemon available. There is also a challenge mode patch which provides a more difficult version of the same hack.
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