I love it! Mt. Quena was very beautiful, and those Butterfree as well! And there were some funny things, like Misty being afraid of bugs again, and Brock saying "I'll use my trusty frying pan as a drying pan!" The baby Rhyhorn and Nidoqueen were so cute (even though it shouldn't be a Nidoqueen, but a female Nidoran)! The music from the first movie was used, which is a good thing, and it was fitting the events.
However, there's one thing I don't understand. Why is Domino so popular? I don't think she is a bad character, but also not that good...
Until years ago, I didn't like it, because I thought it was a movie and I thought it was way too short. However, since the moment I discovered that this is a special and not a movie, I love it. Just like I love the first movie and the origin of Mewtwo.
10/10, no doubt about it!