Climbing the Walls! (Japanese: ショウヨウジム戦！ピカチュウ対チゴラス！！,Cyllage Gym Battle! Pikachu VS Tyrunt!!) is the 25th episode of Pokémon the Series: XY.
Ash and his friends make it to Cyllage City, where Ash plans on challenging the Gym Leader Grant. Having already seen his strategy with Onix at the Battle Chateau, Ash plans on having Froakie face the Rock Pokémon in battle, and later Pikachu against Tyrunt.
This episode starts when Ash, Serena, Clemont and Bonnie come across Cyllage City for Ash's next gym battle. When Ash was pumped up and go a direction he thought the gym is, Serena told him it's not that way it's the other way. Ash was embarrassed and went that direction. When they got to the gym they saw Grant climbing a wall like when they met at the Battle Chateau. But instead of any wall he was climbing his gym wall which is a rock climbing wall. Grant told them to climb up the wall to get to the top and he will battle them there. Obviously as a gym leader he can't not accept the gym battle. He said if you can't climb up he told them they can take the elevator. Ash climbed up as told and Bonnie tried to climb up straight after but Clemont stopped her. Ash and Pikachu climbed up and the others watched them with a some guiltyness. But when he got to the top the others took a elevator and met him up there. Grant asked a few questions before the battle. Number one what was he thinking before he got up to the top? Ash said nothing really. Number two what was he looking at before he got up to the top? Ash said to get to the top. Grant was very pleased with the answers and new Ash was a great trainer to go up against. Then the battle started. The ref said the normal rules but he also said the challenger must get out all his pokemon in this battle against the gym leader. Grant said he wanted to see how all Pokemons work with their trainers. So Ash agreed and the official battle began. Grant first sent out his Onix like he did when he was at the battle Chateau and Ash sent out Froakie. As the battle went on Froakie won. Now Grant sent out his next pokemon, Tyrunt. A fossil pokemon which is a Dragon/Rock type. Ash left his Froakie but it lost because of Draco meteor. Next Ash sent out Fletching which also lost to Tyrunt. The final pokemon for Ash is Pikachu. It was a tough battle for Pikachu because he is an electric type but won. The battle finished with a not very effective Thunderbolt. Ash won himself a cliff badge. Then Grant told Ash they will meet again at the battle chateau and try win against him next time. Ash agreed and asked where the next gym is. Serena said its at Shalour city. Grant said this gym leader has her own type of battling style and is a very interesting gym leader. After all that they said goodbye to Grant and left for Shalour city.