01 - Whisk together BBQ sauce, olive oil, honey, soy sauce, smoked paprika, garlic powder, black pepper, and salt in a large bowl until fully combined.
02 - Add chicken cubes to the marinade, toss thoroughly to coat, cover, and refrigerate for at least 30 minutes or up to 2 hours for enhanced flavor.
03 - If using wooden skewers, soak in water for at least 20 minutes before grilling to prevent burning.
04 - Thread marinated chicken, pineapple chunks, bell pepper, and red onion alternately onto skewers, distributing ingredients evenly.
05 - Preheat grill or grill pan over medium-high heat and lightly oil the grates to prevent sticking.
06 - Place skewers on the grill and cook for 12–15 minutes, turning every 3–4 minutes for even cooking. Brush with additional BBQ sauce during the final 5 minutes.
07 - Grill until chicken reaches internal temperature of 165°F and vegetables and pineapple show slight char. Remove from heat and let rest for 2 minutes before serving.