While playing as Super Saiyan 4 Goku, instead of using just 10x Kamehameha use the following combo. Increase to maximum power and have three favorite technique bars full. When you are at maximum power, find a good time to attack your opponent (for example, when they run away to charge or when they are close to you). Use Instantaneous Transmission (L2 + Circle) to warp behind your opponent. As soon as you are behind your opponent, press L2 + Down + Circle to use 10x Kamehameha to hit your opponent from behind. This attack is not stronger than the regular 10x Kamehameha, but it is harder for your opponent to dodge.