Pretty nice
Graphics where ok. Effects where nice but I spotted a squished rocket launcher once and a static Sonic while he's supposed to be attacking. Shading was descent but Sonic and Knuckles looked weird in their final form. I knew they were supposed to be emitting light, but it didn't really appear that way.
Style and sound kind of lag though. Sound was hard on the ears and voices hard to understand, but luckily there were subtitles. Sonic's voice sounded kinda corny though, and didn't really fit a "good guy".
My main complaint about the style is sonic magically being able to do magic tricks and suddenly he has a gun or a sword. I really found that quite corny. I can't judge much about the story as it was a long time ago since I say the other episodes, but there was too much fighting and not enough other original stuff in this episode, I find. Oh and don't claim that this doesn't resemble Dragonball Z, because the bright aura's and lighting, characters with 3 or more transformations and the heavy use of screaming strongly reminds one of that series.
I gave a 9 for violence because, well, there was plenty of it. XD
Humor, well, I spotted only 2 mildly funny jokes here.
Overall, I found it quite well, certainly above average, but it lacks originality and the sound really needs work. And maybe, just calm down slightly, so I can actually follow the fights. ;)