>>21099425Okay I'll try to give you reasons you can dismiss them or just take them into consideration.
Ash had been doubting himself about how defeating Lucario ever since going berserk on Pikachu back during its act.
He saw an opportunity after being impressed by Tierno's skill at evading. So he had so swallow up pride and dance even though he himself knows it isn't as good.
Serena didn't teach him special techniques, she didn't tell him to use any attacks, she didn't explain to him how to fight, so bringing up that she isn't active battler like you did is pointless.
She simply reassures him about doing what he does best with what he has got and his experience. Similar to how Ash advised her to take everything she does and learn from it.
