For lack of anything better to talk about:
It's the middle of the afternoon and you're off work/school. You step out the shower, put on some comfortable clothes and walk into the kitchen to get a snack. Mewtwo is standing there and tells you that the entire reason Smash was created was to determine the greatest fighters in the universe.
Master Hand, the God of the this world, learned of an impending apocalypse: The Subspace Emissary. Smash 64 was created by him to recruit the most powerful fighters in order to fend off this evil. However, realizing that he could not create this army on his own, he called upon Crazy Hand, the other God, and asked him to help out. Thus, Melee was born. However, deeming even this mass of combatants too weak, they made a third draft, Brawl, and thought it would be enough. Despite Master Hand's capture and resulting confusion, all was well and the entire cast was able to destroy Tabuu.
Or so it seemed. Master Hand and Crazy Hand soon picked up more Subspace Radiation and realized that Tabuu was still alive, along with the Subspace Emissary. They reformed their ultimate army, Smash 4, for a final battle to vanquish Tabuu. However, dead-set on truly destroying Tabuu, Crazy Hand suggested recruiting a real-world Smash expert. Master Hand, initially reluctant, agreed, and, after searching far and wide for the most capable General, have decided upon you.
If you give your consent, that is. Mewtwo offers you two Megavitamins.
The blue Megavitamin erases all memory of this encounter, and you'll wake up in an hour or two thinking it was all a dream. Master Hand and Crazy Hand will find another capable General to fight in this battle.
The red Megavitamin will allow you enter the Smash realm and lead Smash 4's roster in the final war against Tabuu and the Subspace Emissary. However, Mewtwo warns you that your life and the lives of others will be at stake, and that it won't be easy.
Which Megavitamin do you choose?