01 - Whisk together BBQ sauce, olive oil, soy sauce, garlic, smoked paprika, black pepper, and salt in a large bowl until fully combined.
02 - Add chicken cubes to the marinade, toss to coat evenly, cover, and refrigerate for at least 30 minutes or 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 the skewers, ensuring each skewer ends with a piece of chicken or pineapple.
06 - Grill skewers for 12 to 15 minutes, turning occasionally and basting with extra BBQ sauce halfway through, until chicken is cooked through and develops light char marks.
07 - Remove skewers from grill, garnish with chopped cilantro or parsley, and serve immediately with lime wedges on the side.