Preheat oven to 375°F (190°C). Line baking sheet with parchment paper.
Unroll crescent roll dough and press perforated seams together to create solid sheet. For pizza dough, roll out to ¼-inch thickness.
Cut dough into 4 equal rectangles, approximately 4x6 inches each.
Spread 1 tablespoon pizza sauce on one half of each rectangle, leaving ½-inch border around edges.
Sprinkle generous amount of mozzarella cheese over sauce. Add chopped pepperoni and optional toppings. Dust with garlic powder and Italian seasoning.
Fold unfilled half of dough over filling. Press edges together firmly with fingers, then crimp with fork tines to seal.
Brush tops with olive oil or melted butter. Sprinkle with Parmesan cheese. Poke 2-3 small holes in top of each pocket with fork or knife to vent steam.
Place pockets on prepared baking sheet, spacing about 2 inches apart.
Bake for 12-15 minutes until puffed and deep golden brown. Rotate pan halfway through for even browning.
Cool for 2-3 minutes before serving. Serve warm with extra pizza sauce for dipping.