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