In a large bowl mix together ground chicken, 2 garlic cloves, egg, Parmesan, parsley, and red pepper flakes. Season with salt and pepper then form into tablespoon sized meatballs.
In a large skillet over medium heat, heat oil and cook meatballs until golden on all sides and cooked through, 10 minutes. Transfer to a plate and wipe out skillet with a paper towel.
Melt butter in skillet then add remaining 3 garlic cloves and cook until fragrant, 1 minute. Add noodles to skillet and toss in garlic butter then squeeze in lemon juice. Add meatballs back and heat just until warmed through.