Wow, if nothing else this Flash has magnitude. Nearly half an hour of solid animation, plus you did a lot of voice work yourself. I don't know what all to say about this - most of the drawings are horribly simplistic, and while some objects are elegantly simplistic, others are not. For a few shots you pay exquisite attention to detail, and yet other times you don't. This is so oddly inconsistent I really don't know what to review.
On the issue of the story, I really can't say I enjoyed it at all - watching seemed mostly like a waste of time. Your rap battles tend to be a lot more animated and immediately interesting, whereas this took a very long time to say very little. I'd have to say my favorite part of the animation was the stories at the end, except even then I didn't really like it that much - more like it just held my interest.
There's a definite style here, but you need to take advantage of it and make it work better for you. Part of this comes from how little music there is in this - adjusting the animation to how silent and devoid of energy this animation is would be critical to improving it. The mumbled voices and faded colors made me think of Napoleon Dynamite, only you try too hard to incorporate a narrative and it takes away from the final product.