Grab a sizable bowl and combine the instant banana pudding mix with the crushed pineapple until it achieves a consistent thick texture.
Gently fold your whipped topping into this mixture using a soft spatula.
Delicately mix in the small marshmallows, the majority of your finely chopped walnuts (remember, you've kept some aside!), most of the tiny chocolate bits, banana rounds, and your halved cherries.
Pop the bowl in the fridge for around 60 minutes, allowing the flavors to mingle and the marshmallows to get a bit softer.
Once you're ready to serve, sprinkle the reserved walnuts and chocolate bits on top for a touch of extra crunch and sweetness.