The Oats which I have used here is Quaker Rolled oats.
I have used fresh coconut, to get fresh coconut, break open a coconut, using a knife or scraper I take out the flesh chop into little pieces and blend them in a mixer. You can also buy fresh coconut in Asian Grocery shops or online. If you cannot find fresh coconut you can use tinned coconut milk/ cream instead.
If you use fresh coconut, when you break it open you get coconut water in it, filter the water sometimes there will be remnants from the coconut skin, you can even use this water to blend with the pineapple chunks to get the fresh juice.