Thumbs up if you think sonic would beat Usain Bolt.

2:21 for the most epic handshake in gaming history

HOW DOES SONIC POSSIBLY HAVE ANY COMPETITION IN A GOD DAMN RACE

Nintendo and Sega forever.

2:19 always gives me chills. I just love Mario & Sonic at the same level. No one is better than the other; they're both the best. :D

0:15 Just imagine if the Thames was THAT clean!! I would actually eat my hat!

those Dream Events looked FREAKING awesome!!!!!

holy **** Blaze looks so happy in this game xD and football all the way

nintendo + sega = Ninsega

Such a good game, I'm addicted to this now, got it on Christmas absolutely love it.

1:01 Shadow: 'Cause bicycling is totally badass...

Wow best weather I've ever seen in England, and I live here :/

I cant wait to see shadow do some synchronized swimming XD

I love Blaze! She's just too cute!

OMG peach looks beautiful 1:13

LOVE THIS GAME! Highly recommended! :)

London would be proud of you both, Mario and Sonic! :D

Beach volleyball, cycling and new dream events! This game is gonna be awesome!

You got to admit that Mario is way better at 100 metres pluming

i don't even know why i like these games

love the accuracy of the road markings on Westminster Bridge at 1:57

Olympic over but sadly no Paralympic in this game - should get it in the game too. Nearly over for London 2012 as soon as Paralympic closing ceremony is over on Sunday. We'll hand over to Socei for 2014 then to Rio 2016 - I think the game will be most brilliant for Rio cos very colourful celebration with carnival time! Farewell London 2012!

I'm so ashamed this was the first sonic game I ever played.

2:18 *they take each other's hand* 10 seconds later: MARIO: Ok, you can let go now....

the start up of the game is amazing, why cant they make the game that good on the wii

next we need to see Nintendo and Sega at the Olympic games. featuring link and other characters from these companies thumbs up if u agree

To be fair a lot of Sonic characters (metal Sonic, Shadow, Blaze, even Tails and knuckles at least in the original games) are nearly Sonic's speed. Against Mario characters though... yeah seems kind of unfair but guess it's due to you know having to even the odds as it were.

I love how Sonic just leaves Blaze hanging there.

They have made the London 2012 logo quite cool.

So, everyone here is rooting for their favorite characters. I, for one, am still giggling like the crazy little fan girl I am :'D MY TWO CHILDHOOD HEROES IN THE SAME GAME!!!! And since we are talking about our favorite characters here: GO YOSHI! GO KNUCKLES! GO LUIGI! GO SILVER! I LOVE YOU GUYS!!

That game looks fantastic!!!

Silver won a Silver Medal, oh boy X'D

Oh my goodness, the dream events looks awesome! Thanks for uploading this!

its so cool to have the olympics in london my hometown :)

Sonic,Shadow,Silver

2:19 BEST video game Moment 4 me ever :,D

It looks like a good game and I can't wait to play it when it comes out.

It's a beautiful video London is really an amazing city !!!!

This game looks awesome!

It's been 20% cooler since 2008.

Mario & Sonic at the Sochi 2014 Olympic Winter Games in 2 more years!!!! :D

Way to go Knuckles, that soccer ball probably disintegrated in space.

I just bought and played this game. It's very nice! Better than its prequels, and a nice collaboration of Mario and Sonic characters.

I CAN'T STOP WATCHING THIS TRAILER!! I'M GETTING MARIO SPORTS MIX, MARIO SUPER SLUGGERS AND THIS HOPEFULLY!! :D

Team Mario! At least he has Bowser on his team.

Blaze's horrified face at 1:50. *dies laughing* XD

looks like the best sonic and mario game yet. I have per ordered mine :-)

GO MARIO AND SONIC! This is making me excited for London 2012 whilst I'm watching this AND the Diamond Jubilee!

they shouls make this into a tv series

lol just seeing shadow and metal sonic in this makes me giggle :)

BOTH TEAMS ROCK!! :D

It's a beautiful video London is really an amazing city !!!! My country even appear in this video ( the flag of Brazil behind the Mario ) = D

GO YOSHI!!!!! :D

GO SHADOW! #1! GO SHADOW! #1!

Awesome trailer is awesome!

AMAZING GAME. Well watching it anyway

LUV BOTH OF THEM !!! :)

GO MARIOOOOO!

2:15 Silver got silver. :3 This game looks amazing, I totally should get it. ^_^

2:21 most epic handshake in video game history

I love Mario and sonic

Its great to see that they added more games into this one, than the other one from bejing.

0:55 beatiful, Blaze. I knewe she has new costume(i was thinking, that she must have swimming suit). I'm gonna test this at Digiexpo this october

i cant wait for this to come out!!!

I got this for Christmas :D

oh my god. BOWSER'S LITTLE SIDEKICK IS SO SPAZZINGLY CUTE. :333

This game is better than the previous games and I like this song!

This video made me want to go to London! :D And have this game, just because it looks really fun and... equestrian jumping show?! Awsome!! 8D

I'm really looking forward to play this game! I'm joining Team Mario first!

dang i want this game so much!!!!!!

Now, don't get me wrong, I love this game. In fact, I've hardly stopped playing it since I got it. But the Sonic characters voices...make me die a little inside.

Man, remember when people were all like Sega is #1 or like Nintendo rules! I'm glad we can come together now.

GO MARIO GO !

OMG just bought this game yesterday! It's already under my christmas tree. So excited :))))

OMG! this is so amazing!

i can't wait til November 15 2011 and the real 2012 Olympics.

MAARIOOOOOOOO

I got this game for Christmas and im tellin ya, once you put your hands on that wii remote, you will never be able to get them off XD. I ♥ this game

C'mon guys , you can do it!! especially for Luigi and Daisy , You two can do it!! C'mon!!!

Wow really cool,I hope this is game is more better than the Mario and Sonic at the 2008 Beijing Olympic games!! ;)

Can't wait for Sochi!

WOW Great animation :O

I CAN'T WAIT TO GET THIS GAME!!!!

cool! that game looks so much fun!

am happy to see mario, sonic, shadow, blaze, and bowser.jr :) i alway use this character

Sonic is the best

AMAZING!!!!!!!!!!!! i love it

This is an Awesome game! 1:50 "why the heck are you grabbing my legs!?" -Blaze-

Love it how the top two comments are votes of Team Mario and Team Sonic. And the votes are same '88'. Proves they both are awesome!

looks so crazy awesome:D

Tails got Bronze Silver got Silver :D DonkeyKong Bronze :D Amy, Daisi, Peach and Blaze Gold

OMG!! I have to get this game! The other two were good, but this look more exciting :) :)

That was amazing. Imma get it in Dec.

Luigi really enjoys riding that horse. :D

Silver did a wicked smash... and he and dk STILL lost.

They should make a game where Sonic gets stuck in the Mushroom Kingdom and Mario gets stuck in Sonics land (Green Hill or Emerald City?) and they both have to get back in their own dimensions. I would love to play that!

The Olympics just got 20% cooler. ;)

TEEM SANIC

GO LUIGI

I WANT THIS GAME SO MUCH!!!