Bowser. Sonic sucks. And Bowser has awesome spikes on his back
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.
In a fight? Without weapons/power-ups: Bowser would crush Robotnik, obviously. With weapons/power-ups: Robotnik would crush Bowser, obviously. The better character? The Doctor. Bowser is a very one dimensional character, rarely showing interest in much more than kidnapping Peach. Robotnik's goal to take over the world is a logical one, and his character has more depth.
Dr. Eggman
Probably not, but I would love to see Bowser Jr and Eggman in the next Super Smash Bros.
Bowser
Real time: Dr. Ivo "Eggman" Robotnik - 20 years old. Bowser - 25 years old. Fictional time: Dr. Ivo "Eggman" Robotnik - 45-55 years old. Bowser - 30-40 years old.
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.
If you mean in the game Mario & sonic at the winter Olypic games, well after you beat eggman and bowser you have to complete bowser jr and M. Sonic quest afetr Bowser Jr and Metal sonic will join. Then beat Bowser And Dr.eggman. Then they'll join. Sorry if it's too long.
Bowser, Bowser Jr., Metal Sonic and Dr. Eggman
Im going to have to say Bowser. Yep.
I'd bet on Bowser.
The answer is Bowser, Eggman, Bowser Jr, Metal Sonic.