Sky High Gym Battle! (Japanese: ヒワマキジム！大空の戦い！！ Fortree Gym! Battle In The Sky) is the 45th episode of Pokémon: Advanced Challenge.
The time has come once more. Ash is ready with his Gym Battle with Winona. Before the battle starts she evokes a prayer to all Flying Pokémon to give her strength. And now the battle begins. Will Ash fly high in the sky or will he crash and burn?
It is time for Ash's and Winona's battle. The elevators climb up atop the pillars. Winona prays before the battle to give her Pokémon power to defeat Ash. As her first Pokémon, Winona sends Altaria. Ash brings Grovyle, surprising everyone. Altaria starts using Dive, so Grovyle counters with Bullet Seed. Altaria dodges and goes to peck him, so Grovyle jumps, but Altaria still pecks him. Altaria goes to attack once more, but Grovyle's speed makes it dodge. Grovyle is exhausted, but Winona is still impressed. Team Rocket got lost while following their way to the battlefield. Meowth gives them some sods and begin to dance. Meowth ponds them, saying the rods are to find items. James and Jessie are skeptical, but change their opinions when they see the rods turned, so they grab them and run to that direction.
Altaria uses Dragon Breath, hurting Grovyle. It uses again, but Grovyle dodges the attacks. Grovyle attacks Altaria with Bullet Seed, though Altaria goes up and attacks with Dragon Breath. Grovyle evades, jumps and uses Leaf Blade, putting Altaria to the ground defeated. Winona is amazed (even if she was off-guard). She sends Pelipper. Ash calls Grovyle back and sends Pikachu. Winona thought as much, so Pikachu uses Thunderbolt while Pelipper Steel Wing. Pelipper touches the ground with the wing, so no damage is dealt. Team Rocket wander underneath the battlefield and are electrocuted by the attack and are blown near the battlefield, seeing Pikachu attacking. So, they go to their original plan.
They go to get Pikachu, but are stricken by Pikachu's attack and blasted off. Pelipper uses Quick Attack (with its wing on the floor) and damages Pikachu. Pikachu uses Quick Attack, but is stopped by Hydro Pump. Pikachu is pushed, but Ash spots Pelipper got its wing from the ground. Pikachu uses Thunder, defeating Pelipper, but with the exhaustion, he is defeated as well. Ash finds himself on difficult position. Winona tells Ash that she is loved by the sky, so she specializes in Flying Pokémon. She sends a Swellow, but a shiny one. Ash sends Grovyle to match its speed. It uses Leaf Blade on Swellow. Swellow uses Aerial Ace, so Grovyle jumps and uses Leaf Blade, but...
Swellow dodges and pushes Grovyle using its beak and sends him down to the ground defeated. Max explains May how Aerial Ace works. Ash sends Grovyle back and sends his Swellow. To intense the battle, Ash and Winona go higher. However, the wind can make the battle tricky. Swellow uses Wing Attack, although Brock says he is using the wrong attack. The shiny Swellow stays on course, so Swellow goes out of balance. The shiny Swellow pecks the other, hurting it. Before it hits the ground, Swellow gains balance and gets back to air. The shiny Swellow uses Hyper Beam, but misses. The third attack hits Swellow. The shiny Swellow makes another attack, but Swellow dodges and uses Quick Attack, but shiny Swellow uses Aerial Ace.
The shiny Swellow hits Swellow with the attack. The shiny Swellow follows Swellow, so it begins to shake at full speed, evading the shiny one. Ash needs to think to beat Aerial Ace, so he spots the middle of the battlefield. Winona is amazed by how much Ash got to this moment, but thinks she should end - she orders the shiny Swellow to use Hyper Beam. May and Max cannot see what is about to happen, but Ash orders Swellow to use Quick Attack and Dive. The shiny one misses and goes after Swellow. The shiny Swellow uses Aerial Ace and Swellow uses Wing Attack and points it on the ground.
The smoke makes it see the shiny Swellow using the attack. Swellow uses Wing Attack, defeating the shiny one. Winona gives Ash the Feather Badge and is amazed by the strategy he developed. She asks him how it was to fly the skies, so Ash says "Awesome!"
- Featured Pokémon: Baltoy, Lapras, Meganium, Ledian.
- At the beginning of the episode, a classic Pokémon identification can be seen. In this case, it is a Primeape.
Winona's Swellow does not have sparkles coming out of its Poké Ball when it is sent out.