In a large mixing bowl, combine the instant pistachio pudding mix and crushed pineapple.
Stir the mixture until well combined.
Fold in the mini marshmallows gently.
Add the whipped cream and mix until smooth and fluffy.
If desired, fold in chopped pecans for added crunch.
Add shredded coconut for extra texture and flavor.
Taste the mixture and adjust sweetness if necessary.
Transfer the salad into a serving bowl or individual cups.
Chill in the refrigerator for at least 1 hour before serving.
Garnish with additional whipped cream or nuts if desired.