Moai are probably the most prevalent of the Gradius traditions, only not appearing in Gradius V, but only because others were saying Gradius V needed new things, not the "traditions" that make Gradius, well, Konami!
Moai statues are based on the real life Moai guardian statues found on Easter Island.
The Moai usually stand up or lie flat on the ground, which consists of floating platforms. The Moai always fire Ion Rings, and the rings can be destroyed, but the Moai will simply create more until destroyed. Moai have a moderate amount of health, and can only be killed by shooting them in the mouth. In most Gradius games after II, the Moai will turn red, become more aggressive, and be able to fire many more rings, in addition to being able to stand up and turn around.
- Normal Moai: The normal, unaggressive Moai, who only fire energy rings and don't turn around. First appeared in Gradius.
- Red Moai: The harder version of the Normal Moai, the Red Moai fire energy rings at a faster pace, and can turn around and stand up. First appeared in Gradius II, returning in Gradius III SNES.
- Mechanical Moai: Appearing only in Nemesis 3, mechanical moai are similar to red moai, but are harder to destroy. A second type of Mech Moai lays flat on the ceiling or floor and fires an expanding laser similar to the Up / Down lasers.
- Jumping Moai: Jumping Moai that can spit rings through themselves, first appeared in Salamander, NOT Gradius II.
- Giant Flying Moai: First appeared in Gradius III, these are indestructible flying Moai that spit out smaller Moai. Since they're so large, it can be hard to avoid them. Only appeared in Gradius III.
- Monolith Moai: 4 Moai embedded in a rotating monolith that each fire at you. You can only destroy them if you destroy all the Moai. First appeared in Gradius III and went on to appear in Gradius Gaiden.
- Inflation Moai: Moai that inflate when shot at, making it hard to focus on the boss you're fighting at the time, and also making it harder to maneuver. Only appeared in Gradius III.
- Giant Moai: Giant (and pixelated) Moai that spit out smaller Moai, who in turn fire their rings. Only appeared in Gradius Gaiden.
- Mini Moai: The tiny Moai spit out by the Giant Moai, they fire tiny rings, and would go on to appear in Gradius Galaxies as well. First appeared in Gradius Gaiden.
- Beam Moai: Blue Moai that not only fire ring AND turn around, but they also fire a huge beam, which still fires as they're crumbling. Only appeared in Gradius Gaiden.
- Inert Moai: Black Moai who have no purpose except to be destroyed by the Metal Serpent. The Moai's debris can kill you if you're not careful. Only appeared in Gradius Gaiden.
- Blue Moai: Regenerating Blue Moai who act like normal Moai, except they regenerate. Only appeared in Gradius IV.
- Black Moai: Regenerating Black Moai that act like Red Moai, except the regenerate. Only appeared in Gradius IV.
- White Moai: Moai that help Aa and Mu to defeat you. Only appeared in Gradius IV.
- Regenerating Red Moai: Just what the name says, these are Regenerating Red Moai. Only appeared in Gradius Galaxies.
- Bubble Moai: Huge Moai that spit bubbles filled with Mini Moai. Only appears in Gradius Galaxies.
- King Hanaw: Not your average Moai. This Moai has its own mechanical body in addition to the usual traits Moai have. Only appears in Garudius '95.
- Two Feet Moai Golden Moai Riding Car is Grand Prix Only Appears Konami Krazy Racers
Cameos in other Konami titles
- The Moai is the Gradius icon in Cosmic Wars.
- Moai is also a playable character in Wai Wai World. His special abilities were the ability to break certain types of bricks as well as shoot energy rings.
- Also, Moai appeared as a Yu-Gi-Oh! Card along with Gradius, Big Core, etc. 
- Alongside the Brain Golem, a Moai also appears as a boss in the 1993 side-scrolling beat'em Monster Maulers. In this incarnation, it has an entire upper-body made of stone. (This might have been the inspiration for King Hanaw from Garudius '95.
- Moai appears as a playable character in the fighting crossover game DreamMix TV World Fighters.
- A throwable Moai statue is an unlockable weapon in Busou Shinki Battle Rondo. In addition, a set of Mini Moai options can be unlocked that followup attacks with a barrage of ion rings.
- The Moai appear in Salamander anime Vol.1 as a statue, also a Moai appear in Vol.2 alike the game that they were enemies the Moai was build by the ancestors to defend Gradius.
- A Moai statue appears in certain Castlevania games as a very rare and valuable item.
- A Moai statue makes a cameo appearance in the fighting game Skullgirls, as a super-combo form of the character Double. The game is distributed by Konami, and features work by Castlevania composer Michiru Yamane.
- The Sandlot-developed, Konami published Playstation 2 game Remote Control Dandy SF features the M.O.I., an enormous flying battleship with numerous Moai turrets.
|Moai||Big Moai • Dogas • Vaif • Twin Vaif • Moai Dimension • Alpha/Omega • Dogaltes • Moai Orb • Armored Saint • Crystal Moai|
|Other||Reckless • Striker • Heavy Ducker • Hydra • Ground Spider • Cerberus|