Pocket Monster is a pirated platformer unrelated to the Mega Drive/SNES pirate, aside from being a platformer based off the Pokémon franchise. Unlike a standard NES game, the B button jumps instead of A, which in this game is used to run and do an electric shock, which clears any enemy on the screen. The player can also jump on the enemies like in Super Mario Bros. Pikachu can take three hits before losing a life, with the amount of hits left represented by a Pokéball counter on the top right corner of the screen. There are a total of four worlds (Velbt, Woods, Tableland and Motte) which are split into three levels each, as well as a single-screen boss battle at the end of each. The background graphics are mostly ripped and slightly modified from Athena and Adventure Island II. Some of the enemies are also taken from various games, with some of them based off Pokémon. The music is seemingly original despite having the sound engine ripped from Konami games while the sound effects are taken directly from those games. The ending is Pikachu dancing with an "End" message at the top of the screen.