These enemies are only found in the Moon Kingdom. They resemble the boss Mollusque-Lanceur. Astro-Lanceurs attack by throwing a seashell out of their mouth, like Mollusque Lanceur does in his boss battle. Mario can destroy the creatures by ground-pounding on their head. This causes their space helmet to shatter as well as forcing the Astro-Lanceur to the floor. Mario has his jump height increased, allowing him to stomp on the Astro-Lanceur with ease.