At the Boxing Ring, there was a pink-hooded boxer punching a Sandbag in the middle of the Ring. His coach, Doc Louis was cheering him,

Doc Louis: "Hit 'Em, baby!"

The boxer punched a sandbag so hard, that the impact made the sandbag hit the lights which fell all over the ring. The boxer dodged, take off his pink-hooded outfit, and revealed himself. He was Little Mac.

Little Mac: "Yes!"

He made a striking pose.

Samus (in her Power Suit) shows up to measured her and Mac's size and that made Little Mac angry and his KO Meter built up and did a KO Uppercut on her, which led Samus into a deep KO.

Little Mac: "KO Uppercut!"

When Samus came back to the stage, Little Mac immediately started using all of his moves on her.

Doc Louis: "It's your time, Mac! Show 'em what you got, baby! 1, 2, jab! jab! Hit 'em hard! Uppercut! Body Throw! Pow that armor upright! No flinching! Alright! Smash 'em! A punch is mightier then a sword! You have no attitude, Mac! Quit fooling around up there! Smash ain't no joke!"

Little Mac uses his Final Smash, Giga Mac and turned into a monster and was starting to beat Samus senseless. Then, the two fought.

Doc Louis: "Alright, shake it off, son. Fill up the Power Meter!"

Little Mac's KO Gauge filled up and he was ready for another KO Uppercut.

Doc Louis: "Now, Mac, let it rip! World's waiting for you, kid!"

After all of this is over, Little Mac and Doc Louis are eating Chocolate and Samus shows up, meeting them.

Little Mac: "Since you're a power suit, you just control yourself, do you?"

Samus shaked her head.

Little Mac looked inside her through her clear-green mask.

Little Mac: "Cool."

Little Mac took a break from boxing and sat down eating with his coach, while Samus rolled around in her ball form.

Little Mac teamed up with Samus and they took off to save the world.

Mario, Donkey Kong, Link, Samus, Kirby, Fox, Ness, Peach, Zelda, Marth, Falco, Zero Suit Samus, Ike, Diddy Kong, Toon Link, Villager, Wii Fit Trainer, Rosalina & Luma, Little Mac, Sonic, Twilight Sparkle, Rainbow Dash, Pinkie Pie, Rarity, Applejack, Fluttershy, Mega Man, and Son Goku joined your team.