Combine the brown sugar, crushed pineapple, melted butter, fruit juice, and liquid smoke in a small bowl. Set aside.
Pork Shoulder
Create a pork rub by combining the chicken powder, all-purpose rub, and coarse Hawaiian salt.
Sprinkle a couple of dashes of Worcestershire sauce to wet the pork butt so the rub will stick and be tacky. Apply a generous layer of the pork rub all over the butt.
Wrap in plastic and refrigerate for at least 1 hour or overnight.
Preheat a kettle style BBQ to 275 degrees F (135 degrees C) using briquettes with a hot zone and a cool zone for indirect smoking.
Remove the meat from the fridge and discard the plastic wrap.
Place the butt on the grate on the cool side of the BBQ and adjust the damper vents to maintain 275 degrees F (135 degrees C).
Add to the BBQ a tennis-sized chunk of mesquite wood. Add another after 30 minutes. (Two chunks are enough.)
Smoke until the crust forms on the pork butt and it passes the scratch test. For a 7-pound (3kg) butt, it should take 4 to 6 hours to reach this stage. Scratch Test: If you gently scratch the surface of the meat, the rub should not come off on your fingernail.
Spray with water using a plastic spray bottle every 30 minutes starting at the 3-hour mark.
Lay out aluminum foil on a counter. Place the banana leaves on the foil.
Remove the pork butt and place it on the banana leaves. Add the mopping liquid and return to the smoker. Cook for another 30 minutes.
Remove the pork butt from the smoker, let cool enough to handle, then shred the meat.