Pokémon Silver and Gold form the second generation of Pokémon, after Pokémon Red and Blue. The main differences between the generations is that the game is now in full color, and that there are 251 Pokémon instead of 151.
This movie plays through Pokémon Silver in a fairly fast manner, catching only a half dozen Pokémon in the process, but acquiring all the gym badges, and ultimately beating the protagonist of the previous generation of Pokémon games.
The authors of this movie have written very extensive details of anything regarding this movie, including even some of the mathematical formulas used by the game. As usual, we recommend reading these comments.
You can watch the complete run played back on console