01 - In a large bowl, whisk together BBQ sauce, olive oil, honey, soy sauce, smoked paprika, garlic powder, black pepper, and salt until well combined.
02 - Add the chicken cubes to the marinade, toss thoroughly to coat all pieces. Cover and refrigerate for at least 30 minutes, up to 2 hours for deeper flavor penetration.
03 - If using wooden skewers, soak them in water for at least 20 minutes to prevent burning during grilling.
04 - Thread marinated chicken, pineapple chunks, bell pepper pieces, and red onion alternately onto skewers, distributing ingredients evenly.
05 - Preheat a grill or grill pan over medium-high heat. Lightly oil the grates to prevent sticking.
06 - Grill skewers for 12 to 15 minutes, turning every 3 to 4 minutes for even cooking. Brush with additional BBQ sauce during the final 5 minutes of grilling.
07 - Continue grilling until chicken reaches an 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.