"But to demonstrate the experiment, I need a Pokémon that has mastered Heart Energy."
Before Chen Huan had even finished, Gym Leader Wu Yong took out a Poké Ball, and his mainstay Lucario appeared on the battlefield.
Lucario did indeed possess powerful Heart Energy. Chu Xin had sensed it during his battle with Kaka.
Lucario resembled a dog from the real world, with a fierce, imposing appearance. It had a spike on the back of each paw and another on its chest, with a slender upper body and a sturdier lower half. Mega Lucario had more black stripes across its body, more fur behind its head, darker coloration, and red feet. Its cream-colored fur grew longer, its thighs became slimmer, and more spikes sprouted from the backs of its paws and its feet.
Lucario could detect the Aura emitted by all things. By sensing another being's Aura, it could read their thoughts and actions, understand human speech, and even discern the emotions of opponents over a kilometer away. It learned things it would rather not know, which made it prone to stress. Supposedly, by sensing these waves, it could even perceive the forms of unseen opponents. Because it understood human thoughts, it would only grow close to Trainers with upright hearts. It could do more than read Aura; it could also control it. It wielded that power to hunt, and could shatter even massive boulders.
Mega Lucario's Mega Evolution energy mixed with its Aura and surged wildly through its body, covering it in black markings. Mega Evolution caused its Aura to swell. Bathed in explosive energy, its fighting instincts awakened, driving it to attack enemies without mercy. It focused its entire mind on challenging the enemy before it, and its fighting style could be summed up in one word: "ruthless."