Preheat your pellet smoker to 225°F. For the best flavor profile, use a fruitwood like apple or cherry, or a balanced blend like hickory.In a large bowl, toss the chicken cubes with olive oil, garlic powder, smoked paprika, onion powder, salt, and pepper. Thread the chicken tightly onto the skewers, leaving a little room at the bottom for handling. Place the skewers directly on the grill grates. Smoke for approximately 45 to 60 minutes.
While the chicken is smoking, whisk together the buffalo sauce, melted butter, honey, and the 1/2 cup of grated parmesan in a small bowl.
Once the internal temperature of the chicken reaches 145°F, remove the skewers briefly and increase the smoker temperature to 400°F (or its high-heat setting).
Brush the skewers generously with the buffalo parmesan mixture. Return them to the smoker and cook for another 5 to 8 minutes per side. You are looking for a slight char on the edges and an internal temperature of 165°F.
Remove from the grill and immediately sprinkle with an extra dusting of fresh parmesan and dried parsley. Serve with a side of cold ranch or blue cheese dressing.