Pyroar, as seen in Mega Evolution Special II, is very loyal to his owner. Pyroar is always seen following Lysandre, helping him in any way he can. He is also a serious and a very tight challenger. In addition, Pyroar has a seemingly high temperament against others, except for his owner. When Pyroar distracted Alain's Mega Charizard X and Steven's Mega Metagross from their battle, and the two Pokémon reacted to him, Pyroar snarled furiously at them, owing to his fiery nature.
A † shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.
In Pokémon Generations
Lysandre's Pyroar in Pokémon Generations
Lysandre's Pyroar first appeared in The Beauty Eternal. Before Lysandre appeared on stage, Pyroar fired a Flamethrower and then Lysandre appeared. Pyroar fired another Flamethrower as Lysandre suddenly teleported away. Lysandre then walked onstage, revealing that his first appearance was a hologram. He was always seen out of his Poké Ball.
A Lysandre based on Lysandre's Pyroar was distributed from October 1 to November 11, 2016 via local wireless in Japan as part of the "Pokémon Center occupation plan Pokémon" event. For details, see here.
In Pyroar Breathes, when X infiltrated the Team Flare Secret HQ to stop Team Flare's plan, Lysandre used Pyroar and the rest of his team to attack the intruder. It initially battled X's Salamè before it was recalled. Afterward, Pyroar battled X's Kanga and Li'l Kanga. With the heat of its flames, Pyroar forced Li'l Kanga into hiding back inside its mother's pouch to avoid being burned. When Kanga attempted to retaliate, Pyroar easily overpowered it and slammed it onto the ground.
Later, Pyroar was used alongside Lysandre's other Pokémon to battle Mewtwo at the Pokémon Village in order to capture it. When Lysandre's plan to trick Mewtwo into battling X and Blue and weaken it enough for capture failed, Pyroar and the rest of Lysandre's team battled against Mewtwo again after it Mega Evolved into Mega Mewtwo Y. When Lysandre summoned Essentia and had her use Zygarde's Land's Wrath, the attack's area of effect hit Pyroar and Mienfoo as well, knocking them both out.
When Y had her Solsol attack Lysandre in order to take the Mega Ring off of his hand, Lysandre had Pyroar attack to get Solsol off. Though it managed to throw Solsol off, Lysandre's Mega Ring was taken, causing him to lose the ability to use Mega Evolution. Afterward, Pyroar and Gyarados were used to battle X's Mega-Evolved team. Due to X using multiple Mega Evolutions at once, he was unable to focus on anything other than Zygarde, leaving him wide open to be attacked by Pyroar and Gyarados. Before their attacks could reach, Blaine and Blue arrived and defeated Pyroar and Gyarados with Mewtwo and Charizard, respectively.