Xia You was in no hurry to end the battle. Under the three girls' fierce attacks, he adopted evasive tactics and counterattacked when appropriate, making sure their three Pokémon did not have things too easy.
It was clear that Xia You was holding back.
Even so, Maya, Mizuki, and Shion were still rather flustered.
As for attacking, that went without saying. Greninja darted and dodged, moved fast, jumped high, and could even use Double Team and Substitute. They had no way to deal with him at all.
They could neither hit him nor catch up to him. Even when all three worked together to cut him off, Greninja still escaped.
He really was like a tree frog, slippery and wet, utterly impossible to catch.
After fighting a little longer, Xia You saw that all three Pokémon were panting and knew it was time to end the game.
"Greninja, Double Team, then use Water Shuriken."
At his command, Greninja instantly produced multiple copies, surrounding the three Pokémon in a dense ring before forming a giant Water Shuriken and striking them with precision.
The three Pokémon had nowhere to dodge. All were hit at once and lost the ability to battle together in the explosion of the Water Shuriken.
With the battle over, Xia You recalled Greninja. Looking at the three girls, whose faces showed disappointment but whose eyes were full of what they had gained, he said evenly, "You work very well together, and your Pokémon are excellent, but you lack practical battle experience. You focus too much on flashy movements and overlook how useful your moves are. You should have felt the gap during that battle. Think it over carefully and get more battle practice in the future. You'll improve quickly."
Honestly, Xia You had already been more than generous.