60+ Ft with Pikachu
This is in 1-P mode, Home-Run Contest. Choose Pikachu, change the hat if you want. It was probably luck, but I got 70.8 ft with the magicians hat on. Step right next to the white punching bag. Hold down the left toggle stick and press B. If done right, it should go flying at least over the 60 ft line. No bat required!