I was challenged to make a good deck that has Magikarp as a vital part of the deck (not including it being the prevolution to Gyarados). So, I decided that I could use the Gyarados that does damage based off of all of your damaged Magikarp. On its own, Magikarp is immune to damage on the bench, and Big Parasol attached to your atcive Pokemon also makes them immune to effects, so no worry there! In order to get the damage is to do the damage stacking loop with Klefki, Reuniclus, and Weavile. The bench might seem a little crowded, but a single Magikarp at 10 HP with Luxurious Cape attached brings Gyarados to 390 damage! Happy trolling!