Man, sry won't read the description...
The series is definitely improving! Better FX and better battle. This one felt a bit short, but I'm sure you've put lots of energy into the fight with the robot thing.
The fight was fun, you had a lot more options now than before, and even two overdrives!
I like the story, although I don't actually find it the most important thing in submissions like this one.
Graphics, are good like always, and you had some cool effects that weren't sprites. Good.
About the last episode, I'm a Sonic fan, and I do like Tails. I don't mind that Tails was made weak though, especially with the OD, but not oherwise either. You can portray characters any way you want IMO.
Good job, I'll check out FFS6!