Pistachio Pudding Pineapple Fluff Salad

1 (3.4 oz) Package instant pistachio pudding mix
2 (8 oz) Container Cool Whip
1 (20 oz) Can crushed pineapple, undrained
2 Cups chopped walnuts
1?2 Cup maraschino cherry
3 Cups mini marshmallows

Chop the cherries into fourths, but reserve a few for the top whole.
Mix pudding with cool whip and pineapple with juice, add walnuts, chopped cherries and marshmallows; combine well.
Refrigerate for at least 24 hours so marshmallows can soften, but can be served after 2 hours.
Garnish with whole cherries on top.