Preheat oven to 425°F and line a baking sheet with parchment paper.
Gently inspect crab meat for shell fragments and lightly blot dry if needed.
In a large bowl, whisk together mayonnaise, egg, soy sauce, sesame oil, lime juice, garlic, ginger, salt, and pepper.
Stir in panko breadcrumbs, pineapple, green onions, cilantro, and red pepper flakes if using.
Fold in crab meat gently until evenly combined. Do not overmix.
Using lightly damp hands, form mixture into 16 evenly sized crab balls.
Arrange crab balls on the prepared baking sheet and lightly spray or brush with neutral oil.
Bake for 14 to 15 minutes until lightly golden and just cooked through.
While the crab balls bake, prepare the glaze. Add teriyaki sauce, pineapple juice, rice vinegar, brown sugar, pineapple tidbits, and ginger to a small saucepan over medium-low heat.
In a small bowl, whisk together cornstarch and cold water until smooth. Stir into the saucepan and simmer for about 1 minute until lightly thickened and glossy.
Let crab balls rest for 2 minutes after baking.
Spoon a light layer of glaze over the crab balls immediately before serving.
Garnish with sesame seeds, green onions, cilantro, and lime wedges.