Wow, amazing...
I like how your fights aren't very straight forward like one person having the upper hand all the time. The last fight seemed to be epic, except that he turned out to be a really coward at the end when he used Luigi as a weapon and a shield.
It's also cool the team work. Seems almost like Sonic and Mario have been fighting partners like always.
Sonic's use of the fire flower was great! I also liked how in some moments it went from sprites to more cartoon like.
I'm surprised I found this today the same day you released it. And think about the fact that this also is the day my son is 14 mounts old. That's cool.
Please do not make me wait a year for the next episode!