In a large skillet, heat the olive oil over medium heat.
Add the sliced zucchini and cook for about 5 minutes, stirring occasionally, until they start to soften.
Stir in the corn kernels, garlic powder, onion powder, salt, and black pepper. Cook for an additional 5-7 minutes, until the zucchini is tender and the corn is heated through.
Remove the skillet from heat and sprinkle the grated Parmesan cheese over the top. Stir gently to combine and allow the cheese to melt slightly.
Garnish with chopped fresh parsley if desired, and serve warm.