The Story Mode in Mario and Sonic at the Olympic Winter Games is an adventure filled with events and characters. It also contains Mini-Games that is filled with Joy and Fun.
- Sonic the Hedgehog
- Luigi-Country Cross
- Miles "Tails" Prower-Ski Jumping (Singles)
- Princess Peach (Mario only)-Snow Machine Fight
- Knuckles the Echinda-Biathlon
- Amy Rose (Tails only)-Ski Shooting
- Shadow the Hedgehog-Ski Cross Racing
- Silver the Hedgehog (with Blaze)-Ice Hockey, Fever Hockey
- Blaze (with Silver the Hedgehog)-Ice Hockey, Fever Hockey
- Donkey Kong (Silver only)-Moguls
- Vector (Donkey Kong only)-Speed Track 1000m
- Princess Daisy (Blaze only)-Ultimate Figure Skating
- Wario (with Waluigi)-Bobsleigh, Snowboard Cross
- Waluigi (with Wario)-Bobsleigh, Snowboard Cross
- Bowser, Jr.-Speed Skating 500m
- Metal Sonic-Rocket Ski Jumping
- Bowser (with Dr. Eggman) (Mario and Sonic only)-Blazing Bobsleigh, Fever Hockey, Extreme Snowboarding
- Dr. Eggman (with Bowser) (Mario and Sonic only)-Blazing Bobsleigh, Fever Hockey, Extreme Snowboarding
- Chao (Curling only)
- Bowser, Jr.-Speed Skating 500m
- Eggman Nega-Nordic Combined, Skeleton
- Metal Sonic-Rocket Ski Jumping
- Dry Bowser-Supersonic Downhill, Curling Bowling
- King Boo (Luigi only)-Giant Slalom
- Jet the Hawk (Sonic only)-Deluxe Halfpipe
- Giant Bullet Bill/Banzai Bill-Blazing Bobsleigh
- Dry Bones/Chao-Curling
- Rouge the Bat-Figure Skating
- E-123 Omega-Intense Short Track
- Bowser/Dr. Eggman (Mario and Sonic only)-Blazing Bobsleigh, Fever Hockey, Extreme Snowboarding
- Rouge (Olympic Memoribila only)
When the 2010 Winter Olympics are about to start, Bowser and Dr. Eggman arrive and try to ruin the Games since they weren't ready. Bowser then melts all the snow everywhere but Blizland while Dr. Eggman captures all the Snow Spirits but Frosty. They then leave as Mario and Sonic arrive finding out that Frostown's snow has melted. Frosty, the Frostown spirit makes Frostown snow again as Mario and Sonic adventure to stop Bowser and Dr. Eggman.
After breaking the Gate, they encounter Bowser, Jr. who is guarding the Plaza in Frostown from Mario and Sonic. He finds out that they broke his Ice Gate so he challenges them an Olympic Event. He is defeated and he runs away and makes Bigger Ice Walls.
After arriving in the Plaza, Mario and Sonic must continue doing missions in order to break the Ice Gate. They then encounter Luigi and Tails who after the Heroes defeat them, they join the Party to defeat Bowser and Dr. Eggman.
After breaking the Gate, they encounter Dr. Eggman Nega who is guarding the Cannon to Sparkleton from Mario and Sonic who also captured Sparky, the Snow Spirit of Sparkleton. He then promises to the Heroes that if he loses the Olympic Event, he will free Sparky. After being defeated, he teleports to another place instead of freeing Sparky. Frosty then frees Sparky with his powers and Sparky makes Sparkleton snow again. Everybody then travels by Cannon to Sparkleton, a Dream Event Island.
After exploring Sparkleton, Peach will ask Mario to play her in a Dream Event. After she is defeated, she joins the Party to help Mario and Sonic defeat Bowser and Dr. Eggman. She then does a Mission for a Goomba and Luigi unlocks the Gate with the experience of the Boos. Peach will go back to Frostown to move the Thwomp in order to obtain more Ice Crystals and to get Knuckles onto the Party.
After breaking the Ice Gate, they encounter Metal Sonic who is guarding the other half of Sparkleton from Mario and Sonic. He then challenges them to a Dream Event. After being defeated, he flies off and helps Bowser, Jr. make more Ice Gates.
After exploring the other half of Sparkleton, they encounter Amy who is looking for Tails to fix her item. She challenges Tails to a Dream Event and is defeated. She then joins the Party and goes back to Frostown and unlock a Gate with her hammer in order to obtain more Ice Crystals.
After breaking the Ice Gate, they encounter Dry Bowser who is guarding the Cannon to Polastraits from Mario and Sonic who also captured Pola, the Snow Spirit of Polastraits. He then challenges the Party to a Dream Event in order to scare the Party away. He is then defeated instead and is scared away so he runs off to another place but accidentaly frees Pola. Pola then makes Polastraits snow again and the Party fly off to Polastraits.
After exploring Polastraits, they encounter Big who is looking for Amy to do the mission. They then encounter Yoshi who is looking for somebody to play Luge with him. The party defeats him and he joins the Party. Yoshi will go back to Sparkleton to hit the switches with his toungues in order to obtain more Ice Crystals.
After breaking the Ice Gate, they encounter King Boo who is guarding the other half of Polastraits and also looking for Luigi to play him in an Olympic Event in order to scare him (Luigi is afraid of Ghosts). After Luigi defeats King Boo, King Boo runs off and cries because he is embarrased.
After exploring the other half of Polastraits, they encounter Silver and Blaze who are looking for somebody to play Ice Hockey. They then go to Cream who is looking for Knuckles to complete her mission before getting Hockey Sticks. They defeat Silver and Blaze who are then upset after they lost after they had a 1 Point Head Start. They then teleport to another place and they continue adventuring. Later on, they meet a Penguin who is carrying an Item. He promises that he will give the Party the item after saving his 2 students. They save the 2 Students and get the item. Tails then looks at a Shy Guy's Machine and goes back to Frostown to fix the same Machine there. They then unlock the Gate and retrieve more Ice Crystals. They also run into Rouge who is looking for Shadow the Hedgehog because she lost her tail and tries to persuade the Party into helping her. Toad also finds out that the Olympic Memoribila in the Building of Frostown are lost.
After breaking the Ice Gate, they encounter Dr. Eggman Nega once again who is upset that he lost the Olympic Event back in Frostown. He then also reveals that he is guarding the Cannon to Cubyrinth and he has captured Cuby, the Snow Spirit of Cubyrinth. He then challenges the Party to an Olympic Event which this time, he says he will try his best (last time, he didn't according to him). He is later defeated and tries to teleport without freeing Cuby but accidentaly knocks him into the Sea freeing him. He teleports to another place while Cuby makes the Cubyrinth snow again. They then use the cannon to go to Cubyrinth.
After exploring Cubyrinth, they find Shadow the Hedgehog who is here to see what the sign in Cubyrinth says. He then challenges the Party to a Dream Event where he is defeated. He then joins the party and they go back to Frostown to talk to Rouge again. She promises the Party if they find 3 Pieces of her tail, they will recieve one Olympic Memoribila. They also go to Sparkleton for Shadow to turn on the Switch in order to open the Gate.
After breaking the Ice Gate, they encounter Jet the Hawk who is guarding the other half of Cubyrinth and also looking for Sonic to play him a Dream Event. After being defeated, he flies away in order to escape.
After exploring the other half of Cubyrinth, they encounter Silver and Blaze once more and they challenge the Party into a Fever Hockey match with a 30 Point (10 Point for each score except Special Shots) Head Start. They are once again defeated. As they try to escape, Toad convinces them to join the Party and they do where Silver gets rid of the Magical Balls with his powers. Knuckles then turns on a machine but realizes the machine fell down all the way back to Polastraits. There is no way out after a small mountain without a tunnel blocks the road and that the road has been moved on the other side. Knuckles breaks a hole making a tunnel. They encounter Wario and Waluigi who is looking for the Party to play Bobsleigh. They are defeated and they run away to another place. They then fix the other side of the road to get more Ice Crystals.
After breaking the Ice Gate, they encounter a Big Bullet Bill who is guarding the cannon to Icepeak, who captured Icy, the Icepeak Snow Spirit, and waiting for someone to play Blazing Bobsleigh. He then races the party. After he is defeated, he flies away and accidentaly burns Icy's cage freeing him. Icy then makes Icepeak snow again making all the islands snow once again.
After exploring Icepeak, they find out that the Gate to Icepeak is locked and Blaze must fix the Machine. After the gate is unlocked, they encounter Donkey Kong who dropped a Banana and needs Silver to pick it up with his powers. Donkey Kong also wants Silver to challenge him in an Olympic event. After he is defeated, Silver convinces him to join the Party and he joins the Party. They then head back to Polastraits to hit a switch. They then make a bridge. Then a Penguin wants Sonic to race him. After the Penguin is defeated, he lets Sonic pass the rest of Polastraits in order to obtain Ice Crystals.
After breaking the Ice Gate, they encounter Dry Bones who is guarding the other half of Icepeak. Dry Bones then challenges the Party to a Curling Match. After he is defeated, he runs off and lets the Party explore the other half.
After exploring the other half, Donkey Kong encounters Vector who is looking for him to compete against an Olympic Event. After he is defeated, Vector reveals that he must talk to Espio and Charmy in order to unlock a Gate and also joins the Party. They talk to Espio and find out that the Gate is in Cubyrinth. After finding out Charmy is the Guard of the Gate, Charmy only wants Vector to do a Quiz. After passing the Quiz, Charmy lets Vector in order to obtain more Ice Crystals.
After breaking the Ice Gate, they encounter Rouge who was mad after she lost her tail. She also reveals that she is a spy for Bowser and Dr. Eggman. Bowser and Dr. Eggman arrive and find out she revealed their secret. They make Rouge do a Dream Event against the Party but she refuses after they yell at her and do an Olympic Event. After she is defeated, she comes back to the Party. Bowser and Dr. Eggman get revenge by capturing Frosty and brainwashing Omega's (Mentioned later) mind. They later go back to Blizland. The party then takes the cannon to Blizland to defeat Bowser and Dr. Eggman.
After exploring Blizland, they encounter Daisy who is looking for Blaze to compete against a Dream Event. After Daisy is defeated, Daisy joins the Party and reveals that she has the power to defeat the Kiki in Icepeak and that the Kiki will open the Gate after being defeated. They go back to Icepeak and retrieve more Ice Crystals after unlocking the Gate and get Wario and Waluigi on the Party.
After breaking the Ice Gate, they encounter E-123 Omega who reveals that he used to be Dr. Eggman's enemy. He sets a Chain Chomp to block the Party from going on and he challenges them a Dream Event. After being defeated, he runs off and the Party continues. Wario then defeats the Chain Chomp with his Farting Power
After exploring the other half, they go back to Blizland and defeat the Shy Guy's bomb in order to go to the Secret Passage in Cubyrinth to retrieve more Ice Crystals (Did you know: After breaking the Ice Gate, Blizland is like Pipe Land from Super Mario Bros. 3).
After breaking the Ice Gate, Mario must enter the Pipes in order to find Bowser and Dr. Eggman. Instead, they find Dry Bowser capturing Frosty and blocking the path to the final boss. He challenges the Party to a Dream Event where he is defeated and he runs off. Blizza then frees Frosty and they follow the Path.
After following the Path, Mario and Sonic meet their final match, Bowser and Dr. Eggman. They challenge Mario and Sonic (only) to play 3 Dream Events. After they are defeated, they stay behind a wall in Blizland where they were defeated and Mario and Sonic get prepared for the Opening Ceremony.
After Bowser and Dr. Eggman are defeated, in Blizland, Bowser, Jr. and Metal Sonic make Challenges (Missions that are harder) in order to prevent Mario and Sonic from going to the Games. They also make a promise that if they complete all Challenges, Bowser, Jr. and Metal Sonic will join the Party. Mario and Sonic overhear the conversation and do all the challenges. After Rouge finds all the Olympic Memoribila, she flies away and thanks the Party for helping her. After Mario and Sonic complete all the Challenges and go back to Blizland, Bowser, Jr. and Metal Sonic will join the Party. Mario and Sonic then go to the place where they defeated Bowser and Dr. Eggman and fight them once more in the same 3 Dream Events. This time Bowser, Jr. and Metal Sonic take Mario and Sonic's place.
After Bowser and Dr. Eggman are defeated again, Bowser and Dr. Eggman asks why Bowser, Jr. and Metal Sonic compete against them only finding out Mario and Sonic brought them here. Bowser, Jr. and Metal Sonic tell Bowser and Dr. Eggman tell there is good in them and that they are invited to the Games. Bowser and Dr. Eggman then join the Party and the Party all go to the Opening Ceremony.