Heat a well-oiled grill or grill pan to high heat. Combine the chili lime seasoning and chili powder in a small bowl. Coat pineapple rings evenly in this mixture. Grill on both sides until grill-marked and charred, 3 to 5 minutes per side. Let cool, then dice.
Scoop flesh of 2 avocados into a bowl, then mash. Dice the remaining avocado. Add it to the bowl, then stir in the lime juice, minced cilantro, chile, half of the charred pineapple and salt and pepper to taste. Top with the remaining charred pineapple, a sprinkling of chili lime seasoning and a couple of cilantro leaves. Serve with chips alongside.