Mix together the kentuckyaki marinade with some pineapple juice in a bowl. Don't be too creative here - the point with this marinade is that the experts already mixed it for you.
Defrost / clean / de-vein the shrimp and put them in the marinade for a few hours.
Load up the Kamado Joe Junior (in my case) with charcoal, and fire it up for direct heat. Open the vents to allow it to go as hot as you can. On a KJ-Junior this will probably take less than 30 minutes to get to temperature.
Cut the pineapple into ¾" cubes and mix with some sriracha sauce to bring some heat to the sweetness. Sprinkle some brown sugar onto the cubes and toss to cover.
Set the Kamado Joe cast iron wok on the Joe Junior rack and splash in about half the stir-fry oil to heat up. Test the oil by dropping in a cube of pineapple into the oil. If it sizzles...
...then drop in all of the pineapple/sriracha/sugar cubes. The point here is simply to heat up the chunks and get the sugar to melt/caramelise into a slight crust. Once done, remove the pineapple and all juices from the heat and keep warm in a bowl.
Put the other half of the oil into the wok and let it heat up again. When hot and smoking, drop in all of the shrimp. Cook for 2-3 minutes or until the shrimp has turned pink...and maybe a slight caramel crust. Don't overdo it, otherwise the shrimp will be rubbery. Take the wok off the heat.
Return the pineapple to the rapidly cooling wok and stir it all up. Tear some coriander leaf and toss the whole lot together. Tip out onto a warmed serving dish.