01 - Whisk together BBQ sauce, olive oil, soy sauce, garlic, smoked paprika, black pepper, and salt in a large bowl until thoroughly combined.
02 - Add chicken cubes to the marinade, toss to coat evenly. Cover and refrigerate for at least 30 minutes, up to 2 hours for maximum flavor absorption.
03 - Soak wooden skewers in water for at least 20 minutes to prevent burning during grilling.
04 - Preheat grill to medium-high heat (400°F) or prepare a grill pan over medium-high heat.
05 - Thread marinated chicken, pineapple chunks, bell pepper, and onion alternately onto skewers. Begin and end with chicken or pineapple pieces to secure ingredients.
06 - Grill for 12-15 minutes, turning every 3-4 minutes. Baste with extra BBQ sauce halfway through cooking. Continue until chicken reaches internal temperature of 165°F and develops light charring.
07 - Remove from grill and immediately garnish with chopped cilantro or parsley. Serve hot with lime wedges on the side.