1. Cook noodles according to package directions and divide among four bowls.
2. In a small bowl, whisk together lime juice, fish sauce, water, 2 teaspoons oil, and sugar until sugar is dissolved.
3. Heat a grill pan over medium-high heat. Divide shrimp among four wooden skewers, brush each with 1 teaspoon oil and grill, flipping once, until opaque, about 4 minutes.
4. Remove shrimp from skewers. Top noodles with shrimp, cucumber, carrots, shallot, mint, peanuts and chile and drizzle with fish sauce mixture.