Man, this is the exact kind of question that keeps me scrolling through Ao3 at 2 AM. The whole Lucario vs. Mewtwo dynamic is a fic writer's playground because it’s never just about who’s stronger; it’s a total philosophical clash. Lucario’s all about honor, aura, and fighting spirit, that underdog warrior vibe. Mewtwo’s this tragic, god-like being born from pure, cold science and rejection. So when you pit them against each other, it’s never a simple beat-’em-up. The best stories use their battles as conversations, you know?
I’ve read fics where Lucario’s physical, close-quarters Aura Sphere clashes against Mewtwo’s vast, detached psychic power become this beautiful metaphor. Lucario is trying to prove that connection and spirit matter, literally fighting to reach Mewtwo on a personal level, while Mewtwo often starts from a place of dismissive, impersonal force. The real development happens when Mewtwo’s perfect defense finally cracks—not from raw power, but from Lucario’s stubborn refusal to see him as just a weapon. The battles slowly shift from annihilation to a grudging, brutal kind of respect, then maybe to a partnership. It’s that classic 'rivals to something more' arc, but with so much more existential weight. You end up caring less about the winner and more about what they’re trying to say to each other with every Psycho Cut and Bone Rush.
My favorite take was a story where after a devastating draw, Mewtwo is just floating there, observing Lucario struggle to stand, and mentally comments, 'Your persistence is illogical. And fascinating.' That moment of cracked indifference is everything the ship is built on.