It depends. It's fairly even.
No super forms here, you see, because Mario and Luigi have no equivalent because they prefer to use that sort of power to weaken an enemy rather than strengthen themselves.
Mario's the strongest, and has some small amount of magical skill. He is also nearly as durable as Luigi. He has no other noteworthy features.
Luigi is the most durable, and about ties with shadow when it comes to magical power. Luigi also jumps the highest and is the second strongest, as well as being in the middle when it comes to speed. His dodging abilities are also very good. Also, Shadow's attacks would most likely have less effect on Luigi than anyone else, as Luigi is the perfect host for the Chaos Heart. Not to mention that Luigi's special ability would, realistically, knock anyone out from electric overload.
Sonic is fast. He has no other advantages.
Shadow is about as fast as Sonic, and can use unique Chaos attacks - which would work well against Mario, but he'd have to resort to physical attacks against Luigi. Chaos Control would work even less - he's not the only one who has been shown to warp time. His power level is close to Luigi's, though it is disputable who is more powerful.
In the end, it would come down to Luigi - he's powerful, good at dodging, and durable.
In the end, it comes to Shadow and Luigi
No weapons: Mario and Luigi's only natural abilities are super jumping and the power to shoot fireballs from their hands, while Sonic and Shadow can both run at speeds exceeding 600 mph, and can apparently shred through steel without injuring themselves. Sonic and Shadow win. Weapons: Mario and Lugi use a Star to go invincible, Shadow and Sonic use the Chaos Emeralds to go super. Tie. Super Sonic is a wannabe of Goku.
for skeleton i would say: sonic shadow silver luigi Mario blaze donkey kong or metal sonic that's my opinion cause i have the game and they work PERFECT! for me! :)
Pretty simple in my opinion Sonic and Shadow are pretty much invincible while in Super Forms. They already would have a strong chance at winning a fight in their base forms, much less, even one of the two Super beings could easily destroy both Mario and Luigi at once with ease. What I’m saying is that it would be too easy for Super Sonic and Super Shadow to win. Not much an argument meant to be had there. Sorry everyone.
Shadow is not stronger than Super sonic because Supersonic uses the 7 chaos emeralds whilst Shadow uses one of the chaos emeralds to use chaos control but sometimes he can use chaos control with out the chaos emerald. But if Supersonic fuses powers with Shadow, Shadow will turn into SUPER SHADOW
No. it would be impossible for shadow Mario to be in every Mario game, because some Mario games came out before there was a shadow Mario, or even a luigi.
No weapons: Shadow uses Chaos Control to slow down time for Mario, making it incredibly easy to kill him with a Chaos Blast. Shadow wins. Weapons: Mario uses a Star to go invincible, Shadow uses the Chaos Emeralds to go super. Tie. IT SAYS A FIGHT BETWEEN MARIO AND SONIC, NOT MARIO AND SHADOW.
Sonic and Shadow would win, because Shadow CAN stop time and defeat mario and luigi, while sonic can turn super and knock luigi like a bowling ball. Mario might have fireballs, but Shadow has electric spears. Luigi has fireballs, Sonic has the speed of light. End Of Discussion.
Now you can change Sonic's texture into Shadow's. But, you will need the Homebrew Channel for your Nintendo Wii, and Gecko OS.Go to http://brawlplus.net/ for the Super Smash Bros. Brawl Hack.Because no one could think of different moves for Shadow. I agree that Shadow should be in the game, but not as a character, but as a color for Sonic. So should Knuckes and Metal Sonic. But Nintendo can only do so much! Besides, Mario and Luigi are actually totally different people. Ever since SSB64 Mario and Luigi have been practically the same people. But then SSBM came out and they differed about half of their moves. But now SSBB is out and they are total different people which is cool! I just wish their final smash was the same but a little different, like Mario's final smash staying the same (only a LOT stronger) and Luigi's being similar to Mario's (only being green fire and going straight like his fire ball and also being very powerful too).So Shadow is an assist trophy and Mario and Luigi are very different now!another reason is there was no time to create a different moveset for shadow.sonic was already a last minute character miyamoto added and the releasing of the game was already delayed. fans were complaining and if they put shadow in, it would have been delayed even more.those idiots who made brawl should have put shadow in brawl as a playable character also tails and knuckles should be playable in it tooyou should mail them a letter saying that shadow knuckles and tails should be playable in brawl too also your letter should ask why knuckles tails and shadow are not playable in brawl
No Weapons: Mario and Luigi's only natural abilities are super jumping and the power to shoot fireballs from their hands. Yoshi can jump very well too, and can temporarily eat things. Sonic and Shadow can both run at speeds exceeding 600 mph, and can shred through steel without injuring themselves. Knuckles can break through almost anything with his knuckles, and is resistant to damage. Sonic, Shadow and Knuckles win fairly easily. Weapons: Mario and Lugi use a Star to go invincible, and Yoshi can use a Morph Bubble to transform into a vehicle to aid Mario and Luigi. Shadow, Sonic and Knuckles use the Chaos Emeralds to go super. Probable tie.
Seeing as how Shadow and Sonic are of equal ability, Shadow would be able to beat Metal Sonic. This is because Metal Sonic cannot beat regular Sonic.
of course not Shadow would be torn up if they had a battle Sonic is 1,000,000x stronger than Shadow.
Sonic is stronger than Shadow and Silver because Sonic can knock Shadow out so bad that when he would cry in his death because Shadow cant even get close to Sonic and if he does then Sonic can use sonic wind to blow him away and then it's lights out Shadow!