In a bowl, whisk together the pineapple juice, soy sauce, honey, sriracha, and garlic powder. Add in cubed chicken, cover, and marinate for 2-3 hours.
Once marinated, thread the chicken, pineapple, peppers, and onions on grilling skewers, alternating the items.
Heat your grill to medium-high. Lightly oil the grill grates and then place the kabobs on the grill. Cover and cook over medium-high heat for 12-15 minutes (or until the chicken is fully cooked), turning once during the cooking process.