Put your roast in your slow cooker.
Cover with the coke and the brown sugar.
Cook on low for 4-6 hours.
Pull the roast out of the slow cooker and shred.
Dump the coke and brown sugar.
Add the roast back to the slow cooker and cover with the bottle of BBQ sauce.
Cook on low for 1 more hour.
Warm up the tortillas so they are soft and foldable.
Lay meat down the direct center of the tortilla, careful to not go all of the way to the edges.
Fold the sides perpendicular to the meat over the meat.
Roll the tortilla up from the bottom to the top, securing with toothpicks.
Fry the chimis in 1 inch of vegetable oil, over medium heat on the stove top.
Turn the chimis over when they start to turn golden brown.
Serve with sour cream, salsa, avocados and cheese.