DP019: Twice Smitten, Once Shy! is an episode where Dawn catches her own Pachirisu.
After staring at a Pachirisu for some time, Dawn decides to capture it. After she captures it, she is immediately attached to it, loving to spend time with it. However, Pachirisu’s playful nature causes Dawn to freak out and doubt her abilities as a trainer. She decides to release Pachirisu, and runs away. Jessie sees this and decides to capture the Pokémon for herself. However, Dawn begins to have second thoughts and decides to re-capture Pachirisu.
"Now you two stop gawking and turn around this instant!"
Dawn yelling at Ash and Brock after she gets shocked by Pachirisu.