I assume you're talking about Sonic Heroes. The answer is nope, you can only play as Super Sonic in the final boss fight against Metal Overlord *Metal Sonic*.
to fight metal sonic in sonic heroes, you have to beat all of the other team's stories, and once that is done, in story select (when you choose the team you want to play as in story mode) keep on going right and you'll see a team called LAST with metal sonic on it. (this is kinda hard.)
Keep jumping on him and dodge his atacks
No as Super Sonic uses only the Chaos Emeralds power whereas Hyper Sonic uses both Chaos Emeralds and Super Emeralds therefore it is like a powered up version of Super Sonic. Keep in mind this form was only used in Sonic 3 & Knuckles.
It is spelled "Egg Emperor" and you have to keep using Thunder Shoot to beat it.
you go to the level were you have to fight metal sonic and keep looking around until you see a ledge and on that ledge all the super emerald's well be there and when you touch them they will be yours if you already have theme go to super sonic in the character selection screen and hold the action button and select him he will make a noise like (HAAA) then go to your favorite level and get 50 rings and transform he will be hyper sonic if he douse not make a noise then you don't have the super emerald's
If all you have is a bicycle you will have to keep on pedaling faster and faster.
If you mean the last boss in his story, you have to catch the big fireball he sends and launch it back at him in order to win
What you have to do is finish the game get all the chaos emaralds [on the bonus stages] complete th game with them all or it will not work. Then when you jump whilse in the air press jump again and then you should transform into onic higher form "supersonic"
Um, by the creators. But, in the games, Sonic must collect the seven Chaos Emeralds, when he has all of them, he can transform into the mighty Super Sonic! But Sonic uses alot of power in this form, so he can only keep it for a short time.
Incredibly doubt it as Sonic is able to keep up with Eggman's machinery if battling at high speeds. Mario can't run very fast. And a metal Mario wouldn't be as awesome as Metal Sonic. Not to mention Sonic is able to beat Eggman using spindashes whereas Mario can only jump on the top which won't do much damage to the robots or use his power flower. Keep in mind these cannot be found on Sonic's world so Mario would be doomed if put into a Sonic game. He can punch really hard though (that's if the game lets him). He can also groundpound which would either damage or destroy the robots.
you cant unless you see a game online like that you can only do that with an online emulator of a sonic game. Keep in mind emulators are ilegal.
beat them or keep them in jail for a super LONG TIME