In a mixing bowl, combine the corn kernels, Monterey Jack cheese, Parmesan cheese, mayonnaise, sour cream, diced jalapeño (if using), chili powder, cumin, salt, black pepper, and cilantro. Mix until well combined.
Take spoonfuls of the mixture and shape them into small balls or patties (1–2 inches). Place them on a parchment-lined baking sheet.
Prepare breading stations with flour, beaten eggs, and panko breadcrumbs mixed with paprika and garlic powder.
Dredge each corn bite in flour, dip in beaten eggs, then coat with panko breadcrumbs, pressing gently to adhere.
In a skillet, heat vegetable oil to 350°F (175°C). Fry bites in batches until golden and crispy, about 2–3 minutes per side. Transfer to a paper towel-lined plate.
Arrange on a platter, garnish with cilantro, serve with lime wedges, and offer hot sauce or dipping sauce if desired.