Pour dry instant pudding in a large mixing bowl. Pour crushed pineapple and pineapple tidbits with juice (do NOT drain!) over the pudding and mix together.
Stir in remaining ingredients until well blended. (I usually add other fruit I have on hand, like a chopped up apple, banana or even some maraschino cherries. This is a very versatile recipe!)
Cover and refrigerate until ready to serve. Makes a lot, so it's perfect to bring for a pot luck!