The 220 hasn't been used for about a month, and when I was pulling it out of the garage to use it, it was hard to move, so naturally I was like crap I left the parking brake on. So I look and it's not on.... but the rear wheels won't turn at all. So I figured maybe I'll just start it and see if it'll move. But it still wouldn't turn the wheels. It shifts gears just fine, but it just won't move... what's up with this thing?

 

I suspect the rear brake shoes are still tight against the drum. It is a common occurance for just about any ATV left with the parking brake engaged for an extended period of time. Remove the right rear wheel and trying tapping the outside of the drum with a rubber mallet. Be careful not to tap to hard and break the drum. You will probably be able to hear the shoes and spring pop back in place.

I had the same thing happen to the front drums on my Bayous last winter when the temp dropped to about 20 degrees at my deer lease. However the drums locked in the free position from overnight moisture. I later loosened them up a little to provide more clearance between the shoes and drum and the problem went away.

 

I got the rear tires moving by taking the rear tire off (like springdrl said(thanks)) but everytime I apply the rear brakes now, they stick and won't come disengaged until I have moved quite a long distance... the brakes just don't want to come disengaged.

 

Then you evidently need to remove the rear hub and lubricate the springs and edges of the shoes where they contact the back plate. You might even find that a single spraying with WD-40 solves the problem. Of course be careful not to spray the friction surfaces of the shoes.

I suspect too that the rubber seal around the backplate might need an application of waterproof grease to help keep out moisture.