
Moves have, in general, been updated to match their stats from Gen 5, including base power, PP, accuracy, and side effects. However, as in Gen 1, TMs are still one-time use, and the good ones are quite valuable. An equivalent amount of Gen 1 moves have been removed from the game, either signature moves of Gen 1 Pokemon, or moves that did not fit well with the Gen 5 Pokedex. New moves have been added, either to add move coverage to Dark and Steel, flesh out certain underrepresented types, or serve as signature moves for certain Pokemon. Attacks still determine physical or special damage based on type, though Ghost has been changed to special, and Dark has been changed to Physical. The type matchup chart has been updated to its usage in Gen 5.

The Dark and Steel types have been added. Due to the shorter length of a Kanto playthrough compared to a Unova playthrough, some Pokemon have had their evolution levels decreased to fit better within the Gen 1 games. All stone evolutions use stones available in Gen 1. Trade evolutions and friendly evolutions have been changed to either regular level up evolutions, or a certain item. All 156 Generation 5 Pokemon exist in this game. There is also a challenge mode patch which provides a more difficult version of the same hack.

The plot is effectively identical to the Generation 1 games, the only major change is in the Pokemon available. This is because the Unova Pokedex was designed to stand alone without any Pokemon from additional regions, much like the original Pokedex. Unova Red is a re-imagining of Generation 1, but using the Pokedex from Generation 5. Hack of Pokemon Red Version (using the Pokered disassembly).
