In a large bowl combine the pudding mix, undrained pineapple and undrained fruit cocktail.
Stir well to blend.
Add the marshmallows and stir.
Fold in the thawed whipped topping.
Cover and place in refrigerator for at least 4 hours before serving.
Note: This is one of my favorite salads. It is quick and easy and everyone loves it. This will go well with anything you serve and disappears right before your eyes.