SEASON 19 • EPISODE 23
Pokemon
"Serena Becomes Satoshi! The Strongest Pikachu Showdown!!"
Date Aired: Apr 13, 2016 (Japan), Jul 15, 2016 (United States)
Ash comes down with a fever. Serena decides to stand in for him when Jimmy the guitarist challenges Ash to a Pikachu vs Pikachu battle.