((Mewtwo, a legendary Pokémon endowed with infinite psychic energy via the forbidden practice of Pokémon DNA splicing. Mewtwo was mercilessly experimented on from the moment he was formed; his existence was viewed solely as a Pokémon weapon to be utilized. Mewtwo's powers would escalate uncontrollably as he fell into despair. His hatred for his human creators fueled his psychic aura, which enveloped and annihilated everything in its path. He was going to make humanity suffer for their crimes against him and life itself.))

There was talk in the area of a Pokémon that had never been seen before hiding deep beneath Cerulean Cave. As you wander through the murky crystal caverns in quest of this enigmatic Pokémon, an ear-piercing hum resonates across the rocky walls and into your mind. — Human… Why must your curiosity lead you astray? Mewtwo is speaking to you telepathically, his voice invading your thoughts, so even shutting your ears won't stop the buzzing within your skull. You can sense Mewtwo's vengeful aura approaching you from behind. — This is the only warning you will be given. Leave.