Heat grill to 375 degrees. Alternately thread fresh pork cubes, zucchini, peppers, and onions onto bamboo skewers. Brush kebabs lightly with olive oil.
For tzatziki sauce: In food processor, process cucumbers and garlic until finely chopped. Drain liquid from cucumbers. Stir cucumbers with yogurt, lemon juice, dill, sea salt, and pepper. Refrigerate until ready to use.
Grill fresh pork skewers approximately 10 minutes, turning occasionally, until char marks form and pork is cooked through. Garnish skewers with parsley and serve with tzatziki sauce for dipping.