Blend all marinade ingredients until smooth.
Divide into two portions—one for chicken, one for shrimp.
Coat chicken in half the marinade; let sit for 15+ minutes.
Toss shrimp in remaining marinade; set aside.
Cut pineapples in half, hollow out centers (save chunks for serving).
Grill pineapple halves cut-side down for 3–5 minutes until slightly charred. Set aside.
Grill or sauté chicken over medium-high heat for 6–8 minutes until cooked through.
In the same pan, cook shrimp for 2–3 minutes per side until pink.
Fill pineapple bowls with rice, then top with chicken, shrimp, bell pepper, avocado, and pineapple chunks.
Garnish with cilantro and lime wedges.