Challenge of the Week is under Mini Modes on the main menu. How it works is you get 3 outs to get as many hits as possible. Each hit you get scores you points and increases the difficulty slightly while also increasing a multiplier. There are also bonuses you can earn that you can see when you start the challenge or you can also check them on the pause screen. 10,000 points really isn’t very difficult if you are careful about not swinging at pitches outside of the strike zone. I got over 30,000 on my first attempt. If you don’t get 10,000 you can retry though. The trophy pops in the mode as soon as you hit 10k.