Welcome Kyle,
Those swingarm bolts have been known to drive old men mad and young guys to an earlie grave...
Well, something like that... When the bikes leave the factory there seems barely enough grease in the linkage to get them off the showroom floor, add a few years of riding and maybe a pressure washer and those puppies get flat out stuck. Rust,dirt and likely the remnants of needle bearings.
There are some specialty tools made to press or pull out the bolts. I have mixed up a solution of 50/50 of acetone and atf (or your favorite penetrating oil/fluid) and soaked and beat and soak.
Keeping the threads from mushrooming out is always a concern, so if you can get it to budge with the nut or possibly a rod coupling. A punch to get started inside the swing arm and then a piece of rod to get it through the rest of the way.
Of course if you have a large press, or air hammer. Probably the most civilized way to go is to find a machine shop and have it pressed out.
I think you can see these things can be a formidable opponant.
I will snoop around for some links, a picture is worth a thousand words...
Tuck\o/