Mewtwo and Missingno Gijinka

I know a few of you have probably been waiting for this one, well damn. If that's the case, I shouldn't even have to point out who this is. But I will, for those new to the old school classics: Mewtwo, Armored Mewtwo, and Missingno respectively.

Daiyun: Born from the hair of a Mew (The master DNA code) also called the Mother of Creation, he was genetically bolstered to inherit the strongest genetic traits. Whereas Mew is the beautiful, loving mother of all, Mewtwo became the dark epitome of destruction, inheriting a crowned halo marked by a skull and held up by spinal cords. His programming under Giovanni has made him highly unstable and as a result, had to be stabilized for a while under the use of a mechanical suit. However, as his power stabilized, it grew immensely, to the point where the software link that analyzed the pokemon engaged in battle with Mewtwo had corrupted.

This corruption led to the creation of the virus named Missingno that eventually caused Mewtwo to go berserk and shed his armor, also draining him and using the energy to physically manifest itself as a dark shadowed figure that embodies the armor.

Even while weakened, Daiyun was able to fight against this transforming entity of chaos, and defeated him, proving that even though Missingno had the data/variable strength of every Pokemon in existence, it would not be able to win, even if it transformed into Mewtwo himself, because it had one fatal weakness. Missingno could not grow without data. It could only become as strong as it knew to become.

Shortly after losing, Missingno restructured itself and escaped, while Daiyun collapsed after exerting too much of his own power. As he awoke, he took it upon himself to seek out and destroy the agent of chaos born of his own power.