Butterfree was one of my favorite pokemon when I was little. I've long since gotten new preferences, but this animation is so cute, it kind of makes me want to pick up my old copy of red version just to say "hi" to my old team. Great job!
Thank you! It always makes me happy to hear people love these guys To answer your question, this one was 197 frames, at 30 frames per second (though I think I slowed it down just a bit, to like 27 frames?)
I have actually done a short animation back when I was in college. It's just under 3 minutes and it took me a few months to complete (and it's kinda old now, like almost 2 years now). But if you want to see it, it's here: [link]