A Scare to Remember is the 89th episode of the AG Series and the 363rd episode of the Pokémon Anime. It deals with Pikachu losing its memory before joining Team Rocket.
It starts off with Ash, May, Max, Brock, and Pikachu who are on their way to Lilicove City. As they were walking, they were in Team Rocket's trap. Team Rocket does their motto with Pikachu trapped. Something caused the machine to overheat and it caused everybody to blast off. Ash tried to catch Pikachu, but he missed and went flying away. Later, we see him, Max, May, and Brock in a tree. Ash was worried about Pikachu but was stuck in a tree. In another group, Jessie, James, and Wobbuffet crashed into a tree. Jessie and James were trying to figure out where they are. Jessie got mad when James thought they were lost. Cut to another scene where Pikachu had no idea where he is. When Meowth got up and saw Pikachu, he thought he wanted to fight him. He then think of Pikachu bringing him to Jessie and James and then he would be happy to give it to them so they can show the boss. We cut short to Jessie and James and then back to Pikachu and Meowth. They discover a Zigzagoon was behind Pikachu because Zigzagoon was scared. Then Beedrill came up and tried to sting Pikachu, Meowth, and Zigzagoon. Pikachu uses Thundershock to scare Beedrill away.