I find the battle hilarious.
Why? The fight went along with the song. Example: "Now break it down and FREEZE! Now break it down and FREEZE!" Result: The banana fires ice at Megaman.
Example 2: "Way at, way at, way at way at" Result: He goes across the screen appearing and disappearing. I think I've proven my point. The sprite work of changing the Megaman 7 megaman to bit 8-bit was cool. I think the mega buster shots could have been a bit larger. It's not a big problem though.
Conclusion: 4/5 9.2/10
Jesse