Remove Taco Shells from plastic container. Bake shells in preheated 350 degree Fahrenheit oven 3 to 4 minutes or microwave on HIGH 40 to 60 seconds.
Mix the tomatoes with the taco sauce in a medium serving bowl. Toss the greens and cilantro in another serving bowl. Put the taco shells on a serving platter with the lime wedges.
Toss the chicken, chiles, and scallions in a saucepan over medium heat until heated through, about 5 minutes. Transfer to a serving bowl.
Heat the oil in a large skillet over medium-high heat. Season the pork with salt and pepper. Add to the hot oil and sear, stirring occasionally, until lightly browned, about 3 minutes. Add the pickled jalapeños and pineapple. Cook, stirring, until the pork is just cooked through, about 7 minutes. Transfer to a serving dish.
Set up a DIY taco bar: line up the taco shells, chicken mixture, pork mixture, tomato salsa, and greens. Instruct guests to assemble their own tacos.