In the battle, he draws on Lucario's experiences from Korrina, transforming them into his own!
The kind of battle experience can only be steadily enhanced through constant battles and continuous training over time. But, in reality, it's not impossible to find a shortcut.
As long as he battles the same species, which have more experience, he can learn much more than usual from the opponent's every move.
However, to achieve this, you need to withstand the onslaught of the opponent's richer experiences, then engage in close combat and learn the opponent's attack patterns physically.
To achieve these two points, your own strength must be greater than the opponent's, otherwise battling with more experienced same species can easily leave you unable to escape, coupled with taking their attacks head-on, many times you haven't learned their battle tactics, you've already been defeated.
But generally speaking, if your strength is greater, your battle experience won't be too lacking compared to the opponent, a Pokémon as extreme as Ash's Lucario is very rare.
Ash's Lucario has a strong talent, and because of this, he hasn't gone through much combat to reach Elite Level. Conversely, Korrina's Lucario, although not lacking in talent, appears less significant compared to Ash's.
Hence the current scene within the field.
The weaker Pokémon have richer combat experience, while the powerful Pokémon lower their strength to gain more battle experience.
Korrina exhibits no awareness, instead showing joy at Lucario's ability to fend off Ash's Lucario's assaults.
"Great! Keep suppressing him! Lucario, Brick Break!"
Korrina's Lucario's bone rod instantly disappears, his right palm transforms into a hand blade, slashing down with fierce momentum!
Ash's eyes flash: "Thunder Punch!"
Ash's Lucario's right fist is wrapped in Thunder Light, unfaltering, directly meets the strike!
"Bang!"
Fist and palm collide, Thunder Light bursts forth. Korrina's Lucario is forced back half a step but quickly steadies itself, counterattacking with an elbow strike.
Ash's Lucario sidesteps the blow, driving his knee into his opponent's abdomen, but Korrina's Lucario blocks it precisely with the other hand!
The two engage once more, trading punches and kicks, each move hitting hard!
Time ticks away second by second.
The entanglement between the two Lucario grows fiercer. Fists whistling, legs flashing, every collision shakes the air with a hum.
"Bang!"
Another Thunder Punch against Brick Break. At the moment Thunder Light explodes, the ground beneath them finally gives way, cracking inch by inch, debris flying!
Korrina begins to feel something is amiss. In complex maneuver exchanges, her Lucario can manage to spar with the opponent due to experience, but now that both are using the same moves and still end up evenly matched, this is evidently impossible.
"You... you actually made your Lucario learn our moves during the battle!!" Korrina exclaims, her eyes widening.
Upon hearing this, Ash beams: "Thanks, Korrina, that's the primary purpose of challenging a gym; thanks to you, my Lucario gained quite substantial battle experience."
"Lucario is actually one of the youngest Pokémon in the team, only younger is Togepi, while those around his age include Gardevoir. But Gardevoir has had a teacher, while Lucario... only learned from me. I've always wanted him to battle with experienced species; however, Lucario's existence is indeed very rare, until I heard about Shalour Gym."
Ash slowly reveals his reasoning for challenging Shalour Gym; there are quite a few Gym Leaders with Gym Level strength, but Ash has only heard of Shalour Gym having a Lucario.
Being a Gym Leader, her Lucario's experience is surely not weak, at least stronger than his own Lucario.
The only thing he can impart to his Lucario is the application of Aura; as for combat experience in fists and feet, while the Aura Guardian heritage includes it, he can only teach the basics.
To enhance battle experience, you must indeed engage in battles, yet Lucario hasn't fought many times; his current Level is chiefly due to training. This mainly relates to Ash's journey, having traveled for less than a year.
Most of the Pokémon are already at Gym Level, each elevating step by step. But due to their considerable talent, their time spent at each Level is short; hence the race from Advanced Level to Elite Level, Elite Level to Gym Level, barely experienced many battles.
Aside from the frequently battling Charizard and Pikachu, the rest's battle experiences don't quite align with their current Level, with Lucario being the most affected.
That's why Ash believes, this battle, even if Korrina's Lucario isn't very high Level, he can learn a lot.
"Damn, to be used as a grindstone?! In that case, we'll MEGA evolve!" Korrina grits her teeth, crossing her arms before her, her right hand's Key Stone radiates brilliant light!