How do you hit a rival with a power up in sonic rivals?

In "Sonic Rivals," you can hit a rival with a power-up by first collecting a power-up item during the race. Once you have a power-up, use it strategically when you're close to your rival. Activate the power-up, such as a projectile or speed boost, to gain an advantage and potentially knock them back. Timing and positioning are key to successfully hitting your opponent.