This was an okay movie. I didn't like the beginning, but it got a bit better as the film went on. I say "bit" because while it did somewhat tie everything up as the trilogy, I do wish they gave more hints in the previous movies. Because I swear that Sheena and what's-his-face basically showed up out of nowhere and proclaimed they were always there from the beginning. What are they, the Rainbow Faces of Land Before Time? Seriously, I do not remember seeing them in the previous two movies even in the credits. (But I'll be very happy to be proven wrong since my memory's not the best in the world.) Of course, big surprise, they turn out to be pretty bland characters. Damos at least had an attempt, I'll give them that (and it's not just because he was played by Dan Green). Marcus was just a dumb villain. His motive wasn't that great, though I read on TV Tropes that he is much worse in the manga. I hope that's true.
Another complaint is Arceus' voice. Oh God, does that voice sound awkward coming out of him. I don't know what the original sounds like, but I hear it perfectly fits the character. This sounded like he had a sore throat that he tried to cover up with his rage (which wasn't too bad, but I have to question the guy's voice acting skills). It got a bit tolerable by the end, but I'm never going to get that voice out of my head, as terrible as it sounds.
Also, I think Sheena's pretty stupid. Yeah, okay, she didn't really know Marcus' true intent, but she had to spill the beans about everything, and then when he hands her the scepter, she doesn't bother checking up on it to make sure it was the real one--and if she had checked up on it, she wouldn't have been tricked to be empty-handed upon approaching Arceus. Guess she's not such a bland character after all since she has a God-mode power that was never alluded to anywhere else and yet is stupid. Also, she looks stupid with her bushy eyebrows. Really, designers? That was what they went with? Eww...
Is it just me, or was Ash's only heroic moment this whole trilogy climbing Space-Time Tower to play Oración? He was more daring in this movie than he was in Sky Warrior, but it still wasn't much.
And though I knew everything would be back to normal, I find it ballsy that the writers had it the script "almost kill Ash and friends". Sure, they were in perilous situations before, but here they almost died. Erased out of existence. I wish this happened more in these movies, I swear they've become afraid to really kill off characters. Really, from movie ten to thirteen you have Disney deaths. Just kill someone off already, preferably the villain, sheesh.
So yeah, nothing too spectacular. It's more entertaining than Sky Warrior for sure (at least none of the characters are annoying like the bitchy Shaymin), but Rise of Darkrai has more of an emotional impact and memorable characters--particularly Darkrai. Music-wise, I'm not sure which is best, but "Oración" is the most memorable moment for me in all three movies. Helps it was visually beautiful. I wish it made a comeback in some form or another.