Omniversia999's Winner Grand Battle Royale

Interlude
Sans: Papyrus, this is gonna be our biggest challenge yet.

Papyrus: What is the death battle gonna be this time, Sans?

Sans: Today, we are gonna see the WINNERS of each fight battle it out in one stupendous battle royale to see who would win.

Rules

 * All characters will be composited
 * Bowser will have all feats, forms, and equipment, including the Pure Hearts.
 * Arceus will have Z-crystals instead of Elemental Plates.
 * Asriel will start out as Flowey and has the six human SOULs in starting inventory, plus a seventh one for later on in the fight.
 * None of the characters know each other except for canonical relations.
 * The fight takes place chronologically after the following.
 * Reality Warping Villains Battle Royale for Bowser.
 * Ultra Sun/Ultra Moon for Arceus
 * A Genocide Route in Undertale for Flowey (who managed to escape)


 * More winners revealed will be added into the fight.
 * None of the combatants will be able to collect stuff from the other
 * This will be an exception for Flowey, who can absorb only ONE soul, but just once.

Death Battle
Papyrus: Alright, we have researched the combatants.

Sans: Let's purge this debate, because it's time for a DEATH BATTLE!