Power Pro Kun Pocket 3 is the third game in the long-running arcade baseball series for hand-helds and the first to appear on the Game Boy Advance. As a whole, it is part of the larger Jikkyō Powerful Pro Yakyū series also developed for the main console systems.

The game includes a Success mode, where the baseball sequences are combined with a larger storyline introducing simulation and role-playing elements. Generally, the aim is to train a weak player to become one of the best, mixed with different intrigues. In this version, the player's character was once a famous high school baseball player who got killed. A doctor resurrected him as a robot and now he needs to go to three stages to regain his status. The first phase requires the character to get drafted with a team, in the second he needs to earn money to earn a life-long battery and the third and final phase requires acquiring a memory level of more than 80%. The character can go to his former high school and duel rivals in different mini-games.