1. Preheat oven to 350 and grease a 9x13 baking pan with nonstick cooking spray. 2. In a large bowl, add cake mix, eggs, oil and half the can of crushed pineapple. Mix well by hand until all items are combined. 3. Pour into prepared pan. 4. Bake for 25 minutes or until toothpick inserted in the center comes out clean. Set aside to cool completely. 5. Set aside to cool completely. 6. In a large mixing bowl, add remaining pineapple, whipped topping and vanilla pudding. Mix well. 7. Refrigerate for 1 hour. 8. Spread onto the top of the cake and serve or refrigerate until ready to serve.