SM043: When Regions Collide!

- (ジムバトル！Ｚワザ対メガシンカ！！) is the 43rd episode of Pokémon the Series: Sun & Moon.

Synopsis
Ash and his Alola friends challenge Misty and Brock to a gym battle at the Cerulean Gym for an extracurricular lesson.

Pokémon

 * Brock's Mega Steelix
 * Misty's Mega Gyarados

Item
Steelixite

Trivia

 * "Who's that Pokémon?:" Mega Steelix (JP)
 * The preview for this episode, shown in the next episode preview segment at the end of the previous episode, is narrated by Professor Oak and Samson Oak.
 * In the Gym fight between Brock and Kiawe during the preview, the brown rock interiors resembling the brown rock interiors used in the Oreburgh City Gym.
 * Brock fights Kiawe in shirtless during their Gym battle as he resembles his game counterpart in Pokémon Red and Blue but wearing a necklace with a Key Stone serve as a pendant where he later removes it to activate his Steelix's Mega Evolution.