How to get an A for Egg Emperor in Sonic Heroes

Here is how to get a A in Sonic Heroes for Egg Emperor. While chasing after him, be sure that your fly character has at least 2 level ups. Once you are on the arena, destroy all four cannons so you won't get hit by them while fighting Egg Emperor. Once all the cannons are gone, rapidly use your fly characters thunder shooter to stun his shield and hurt him. When your team blast gauge is full, use your team blast. Then go back to using thunder shooter. Defeat him under 2:59 to get an A.