Drone Search for Mythical Mew

The drone is the fun build here, 429 pieces with rotors and a radar dish that both rotate and tilt. Load it with berries from the secret storage compartment and drop them onto the target, and the wall of the ancient ruins falls away to reveal Mew hiding behind it. Smash the ruins open and there's a gem inside, plus a buildable Great Ball for your one good catching attempt.