Excellent!
Wow, this was surely a great job!
The sprites are the best available, with some custom sprites too. The animation of them was perfect, too, so nothing to complain about it. The blood is a bit unrealistic sometimes, but it's a minor problem.
The great variety of sounds, music and sound effects was excellent. Good choices of music. The voices were nice, and I liked how you edited the classical "mario sounds". Supreme work about that.
All the jokes were great, I laughed with all of them, but specially with the tetris one, the wrong castle and the frogger one. Hahaha, great.
Overall, an excellent job! Keep making more! :D