Here are the memories Ash, Jessie, James, and Dawn have had before they released a Pokémon, gave them to someone else for training, of almost released a Pokémon and why they released them, gave them to someone else, of almost released them.
Pokémon that have been released
* Ash's memories of Butterfree in "Bye Bye Butterfree"
1. Ash catching Butterfree when he was a Caterpie in "Ash Catches a Pokémon"
2. Caterpie evolving into Metapod in "Ash Catches a Pokémon"
3. Meatpod evolving into a Butterfree in "Challenge of the Samurai"
4. Ash and Butterfree battling against Misty's Staryu in "The...
Here I will lijst off all the Pokémon Ash caught within the first 16 seasons of the anime, what season he caught them, what episode he caught them, where he caught them, and their original trainers (if they had a trainer before Ash). Here are the first 20.
Kanto (Original Series)
1. Pikachu (episode 1- Pokémon- I Choose You!)
Pikachu was Ash's starter Pokémon that he received from Professor Oak. He received Pikachu because he woke up late on the dag he was supposed to start his Pokémon training. Pikachu didn't like Ash AT ALL when Ash first got him, and was very disobedient, refusing to help...