[As our heroes traverse through the void, they finally see a red swirling mass in front of them. The Universal Cosmic Destroyer and almighty idiot, Giygas, has shown himself. As Giygas exudes an aura of raw evil and insanity, a wave of dark power and PSI washes through the heroes.
Goofy: Good gawrsh, what IS that thing?!
Donald: I've never seen this kind of darkness before! I-I can't even comprehend what it is!
Sora: Is this... Giygas? What kind of Heartless has he become? Is he even a Heartless at all?
Riku: The amount of darkness in this guy's heart is insane... It's as if he and his heart have become darkness itself!
Giygas: I am h...a...p...p...y...
Donald: That sounds way too accurate!
Riku: Regardless of how terrifying he looks, we can't back down now! If we don't defeat this guy, who knows how many worlds would be consumed?
Goofy: Right! W-We gotta be brave!
Sora: Losing your mind and body to the point where darkness is the only thing left... I kinda pity him. Let's put his soul to rest, if he still has one at all!
And so, the battle for the multiverse begins...]
This is a little scenario I thought up in regards to Earthbound and Kingdom Hearts. I hope I did good with this!
(Sora and Riku are from Kingdom Hearts, which is owned by Square Enix. Donald and Goofy are owned by Disney. Giygas is from Earthbound, which is owned by Nintendo)