You had recently taken a visit to the Kanto region (for any purpose, you choose) and you had taken a stroll through Saffron city. When you take the stroll, you'd come to find a Fighting Dojo in the city, so you decide to have a try. After beating a few black belts and whatnot, you stumble across a man at the front, with two Pokéballs. "I see you've beaten every member here. So I'll let you choose between these two Pokémon." The man speaks, and you see a Hitmonlee, and a Hitmonchan emerge from the balls, and in your mind, you decide to pick Hitmonchan. You take the Pokemon's ball, eventually heading back home after a bit, and you decide to try and meet the Pokémon a bit better, and as you release it, after trying to speak with it, it would seem particularly.. adamant.