Elite Four Malva (Prize Money: p13,000)
LV63 Pyroar (Fire/Normal)
Pyroar uses Noble Roar which will debuff your attack and sp attack stats. Part of its moveset is Hyper Voice, a special attack that has 100% accuracy and high damage. This is further enhanced by its high sp attack stat and speed. Use Fire or Fighting moves to exploit the weaknesses of its sub-types. However, don't use any Pokemon that are weak against its fire attacks.
LV63 Torkoal (Fire)
This is a pure Fire-type Pokemon that will use Curse to bolster its attack and defense, while sacrificing its already low speed stat. It will unleash Earthquake, which can be pretty devastating against ground targets, especially after Torkoal buffs it up with Curse. Use powerful water or ground attacks to defeat it quickly.
LV65 Talonflame (Fire/Flying)
Relying on its high speed stat, Talonflame will abuse using Brave Bird, a powerful physical attack that damages the user due to recoil. It's Flame Body ability will also leave a burn to attackers that make contact with it. This bird has average HP and defenses so it should be easy to defeat it in one or two hits using super-effective moves.
LV65 Chandelure (Fire/Ghost)
Chandelure has the ability to confuse your Pokemon to stall them and damage them using powerful fire attacks. If your preferred water-type Pokemon managed to breeze through the first three Pokemon using its water attacks, then you should be able to one-hit-KO this enemy.