You have to beat him in a boss fight with Sonic.
there are alot of bosses with dr robotnik, and there are a few games called sonic the hedgehog, please specify.
beat the death egg as super sonic and hyper tails
P. u have to go through the levels, beat bosses.
Why yes you can. You have to beat all of the games. And then you go play sonic collection 2 and defeat eggman and shadow will appear. You have to defeat him and he will be unlocked. you can choose sonic or shadow when you choose a game
You have to beat him in a boss fight with Sonic.
Simply beat Sonic in each level you go to and then you have to beat eggman at the end then after that destroy his eggwalker.
you have to beat them (final boss) then bowser Jr. and metal sonic (after beating eggman & bowser and after you complete all their challenges ) then beat eggman and bowser again the they will "follow" you.
beat all stories
you have to beat the train staion level either sonic or silver.
As seen in the Sonic The Hedgehog theme song, Sonic can run faster than most race cars. If you can do that, challenge him to a race."I don't get it, I can't stop my feet!" ~Sonic The Hedgehog.
the answer is yes,but you can only be Sonic,Tails,Kunx,Shadow,Eggman,Rouge the bat No I beat sonic heroes And NO CHAO WORLD.
For The Last Boss For The Last Episode. (Beat Sonic, Shadow, And Silver's Episodes)
there are alot of bosses with dr robotnik, and there are a few games called sonic the hedgehog, please specify.
you have to beat the story of sonic, tails or knuckles.
beat the death egg as super sonic and hyper tails
You beat all the challenges bowser jr and metal sonic put up and when you finish the missions go beat bowser and eggman again and they will join you.