Scoop the ripe avocados into a mixing bowl and mash them with a fork until slightly chunky but well combined.
Add freshly squeezed lime juice, finely chopped red onion, minced garlic, salt, and black pepper to the mashed avocados.
Gently fold everything together using a spatula until the ingredients are evenly distributed, leaving some texture for a chunky guacamole.
Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper and arrange tortilla chips cut into bat shapes on it in a playful pattern.
Bake the bat-shaped tortilla chips in the oven for about 8-10 minutes until crisp and slightly golden around the edges.
Remove the chips from the oven and let them cool slightly until they are firm and crunchy.
Transfer the prepared guacamole to a serving bowl, smoothing the top slightly.
Arrange the cooled bat-shaped tortilla chips on top of or around the guacamole, creating a spooky scene that resembles wings guarding a bubbling green cave.
Optional: garnish with small edible decorations like tiny plastic bats or herbs for added spooky flair.
Serve immediately to enjoy the crispy chips with the creamy, chunky guacamole, perfect for Halloween party fun.