Draine pineapple, reserving juice. Dip bananas in juice; drain and discard juice. Set aside pineapple, bananas, three red cherries and three green cherries. In a bowl, whisk the eggnog and pudding mixes for 2 min or until slightly thickened. Place half of the pudding in a 4 qt serving or trifle bowl; layer with half of the bananas, pineapple, cherries, cake cubes and whipped topping. Repeat layers. Garnish with walnuts and reserved cherries.
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