That was very touching. Was it inspired by a game experience, other trainers, or did you just come up with it? I can picture that happening to more than one trainer in the Pokemon world.
And I was reminded of my Butterfree from Gold at one point, except that I did go on with the special training to let her keep up with the rest of the team, and she put Red's Pikachu to sleep 3 times! But I haven't touched that game since then, I don't even know where it is now, nor whether it would still work.
I liked the way you described the trainer's emotions, and the speculation about Butterfree's.
May I point out 2 typos? I'll put them in spoiler tags in case you're not interested, but I like it when people help me fix typos in my stories, so I do the same for others unless I'm told otherwise.
(Spoiler:) "It hit my pretty hard"=>"It hit me pretty hard"
"important other things to do"=>"other important things to do"
You're a great writer and you like Pokemon... If only we had you at AC/CC.But it's OK if you're too busy or not interested.