Fittingly, given that Rocky Balboa is a boxing game, your hands will be killing you after just a few hectic rounds. It’s not the game’s fault, though; it’s more the fact that PSP requires you to have fully elastic thumbs.
Thankfully, the controls themselves are well laid out, and make the best use of the handheld’s somewhat awkward layout; after time, they become second nature. The face buttons are for your basic punching: Square and Triangle take care of left and right direct smacks, while X and Circle take care of left and right uppercuts. Simple enough. Combine these with the nubbin - which controls your boxer’s body movement, to alter the power and angle of your punches - and hit R at the same time to dodge any unfriendly blows.