in an alternate timeline:
Beldum had killed pretty much every main protagonist in through boss fights universe except knifeboi, who arrived late to the battle. Seeing the aftermath of what happened, he was overcome by grief but had no time for sadness because of the towering figure of beldum in front of him. Knifeboi activated his neo form and absorbed the crystal of creation into his mech, giving him the power of the crystal. Just as beldum was about to crush him, knifeboi thought about a giant mech and used the crystal to create it within the few seconds he had to live and beldum's fist suddenly bounced off the newly formed Juggernaut of knifeboi giga.