Add the pineapple tidbits (or chunks), mandarin oranges, and maraschino cherries to a strainer to let all the liquid run through. Once fruit is drained, add it to a large bowl along with the mini marshmallows, shredded coconut and sour cream.
Mix everything together gently (the mandarin oranges are delicate so it's best to mix gently).
Now fold in the cool whip whipped topping. Gently mix everything together.
Place covered in the fridge for one hour for ingredients to meld together. Pour into a serving dish, serve and enjoy!