Place breadcrumbs in a shallow dish and set aside. Shred zucchini on paper towels, roll up and gently press down to eliminate the moisture. (do the same with the corn kernels)
Pour into a bowl. Stir together the grated zucchini, corn and egg whites until both are well-coated.
Stir in the garlic powder, salt, pepper, flour and grated parmesan until completely combined. Portion out the zucchini mixture in 2 Tablespoon-increments and press into the breadcrumbs, coating each side completely.
Pan Fried Fritters - Heat 2 cups of oil in a skillet over medium heat. Once the oil is hot, add 3-4 zucchini fritters and fry until golden brown, flip over to other side and brown, then serve warm.
Air Fryer Fritters - preheat to 375 degrees for 5 minutes, set dollops inside sprayed basket (or on piece of parchment paper) and cook for 10 minutes, flip and air fry for another 5 minutes or until they are as crispy as you'd like.