From the Super Mario Wiki
Magikoopas (referred to as Koopa Wizards in the Super Mario World television series) are bespectacled Koopas that can cast spells. Magikoopas made their debut in Super Mario World. They wear blue robes and hats resembling the garb of a wizard. They are generally considered to be high ranking members of the Koopa Troop, and some act as personal advisors for King Bowser Koopa.
Kamek, the leader of the Magikoopas, appears in several installments of the Yoshi series. He is usually the main villain or assistant to the main villain. Kamek is the only Magikoopa that appears in the Yoshi games. Lone Magikoopas appearing in other games are often said to be Kamek. Occasionally, Kamek is actually intended to be the character in question, but is accidentally called plain "Magikoopa" due to the fact that "Kamek" is also the generic name for the species in Japanese. An example of this is Mario Party 9, where Kamek is called by name in the PAL region but is called "Magikoopa" in the North American version.
 Super Mario series
 Super Mario World
Magikoopas first appear as enemies in Super Mario World. In this game they mainly appear in fortresses and castles, where they pop out of thin-air and shoot magic at Mario or Luigi. Their magic blasts have the power to turn a Turning Block into a Yellow-Shelled Koopa Troopa, Thwimp or a Coin. The magic blasts come in the forms of shapes: a circle, a triangle, and a square. These magic spells hurt Mario if he touches them; however, he can safely Spin Jump off of them. It is also possible to cancel out the spell with a cape spin. The circle, triangle, and square have become recurring elements in spells cast by Magikoopas in later games. Magikoopas are immune to fireballs. They along with Chargin' Chuck seemed to have replaced Hammer Bros. as the elite forces of the Koopa Troop.
 Super Mario World 2: Yoshi's Island
 Super Mario Galaxy
In Super Mario Galaxy, Magikoopas, behaving much like they did in Super Mario World, are found on many different worlds and Airships; as always, they attack using magic. Magikoopas always leave behind a coin, regardless of which attack method Mario uses to defeat them.
Kamek makes a brief appearance in the opening scene: he attacks Mario as the plumber tries to rescue the Princess, and sends him flying out into space. A large Magikoopa named Kamella is also introduced as a boss; she is fought up to three times when Prankster Comets are included.
 New Super Mario Bros. Wii
Although absent in New Super Mario Bros., Magikoopas do appear in that game's sequel. However, Kamek is the only Magikoopa who appears in New Super Mario Bros. Wii. He appears right before a castle boss fight, sprinkling his magic dust, making the battle more difficult for the player character, much like he did in Yoshi's Island. He is later fought in the World 8 tower, where upon his defeat, he escapes to Bowser's Castle, where he turns Bowser giant for the final battle.
 Super Mario Galaxy 2
Magikoopas also appear in Super Mario Galaxy 2. Like in the predecessor, they use magic to attack. They can either conjure up enemies (Goombas and Li'l Cinders) or fireballs from the previous game. It is shown in Bowser's Galaxy Generator that Yoshi can eat the Magikoopas, and they'll actually leave three Star Bits instead of one coin.
 Super Mario 3D Land
 Super Mario 3D World
Magiakoopas are set to reappear in Super Mario 3D World.
 Super Mario World television series
Magikoopas, here renamed Koopa Wizards, made various appearances in the Super Mario World television series. The first Koopa Wizard introduced was a character named Wizenheimer, who was said to be the strongest of his species. He appeared in the episode "Ghosts 'R' Us". The first appearance of Koopa Wizards as a species was in the episode "Rock TV", where Bowser used several Koopa Wizards hidden in televisions he sold to hypnotize the inhabitants of Dome City. Near the end of the episode, Yoshi eats all the televisions of the cave-people and spits the Koopa Wizards hidden in them out, saying they tasted disgusting. A Koopa Wizard also appears in the episode "The Yoshi Shuffle"; after being knocked over by Luigi, the angry magician transforms him into an egg. This Koopa Wizard is eventually knocked backwards by a wayward stone football thrown by Yoshi.
The last appearance of a Koopa Wizard was in the episode "Mama Luigi", where one appears to attack Mario while he was exploring the deserted Dome City.
 Nintendo Adventure Books
Magikoopa appeared in two of the Nintendo Adventure Books, but there was only one, Bowser's third cousin twice removed. His magic powers mostly involved shrinking things. In "Flown the Koopa", he captures dinosaurs and shrinks them to put them into his TV as he doesn't have cable. In "Unjust Desserts", his magic is responsible for all of the shrunken Koopa minions invading Yoshi's body.
 Super Mario Adventures
Two unnamed Magikoopas were also featured in the Super Mario Adventures comic; one Magikoopa, similar to Kamek, was shown to be Bowser's second-in-command, organizing his wedding, among other duties. Another, elderly and mustached Magikoopa was also used by Bowser to brainwash Princess Toadstool and several hundred Yoshis. This Magikoopa is eventually defeated when it was trampled by the very Yoshis it had hypnotized.
 Yoshi's Safari
A single Magikoopa appears in Yoshi's Safari as the boss of Cornice Cave. This Magikoopa attacks Mario and Yoshi by teleporting around and shooting magic blasts; he can be defeated by being blasted in the face repeatedly with Mario's Super Scope. Mid-battle, he also makes himself larger and therefore more powerful, although the target of his face is also widened, making the remaining half of the fight somewhat easier.
 Super Mario RPG: Legend of the Seven Stars
In Super Mario RPG: Legend of the Seven Stars, several Magikoopas appear as minions of Bowser. Unfortunately for the Koopa King, the Magikoopas, along with the remaining members of the Koopa Troop, chose to abandon him rather than aid him against the Smithy Gang.
Later on, a brainwashed, red robed Kamek is encountered, acting as a guard in Bowser's Keep. In battle, Kamek would attack by using magic attacks (such as Water Blast, Blizzard, and Flame Wall, and would summon monsters (such as Bahamutt, King Bomb, and a Jinx clone) to fight for and protect him. Once defeated in combat, the brainwashing of the Smithy Gang wears off and Kamek's robes turn back to the standard blue color. Kamek would then become an ally of Mario, healing him and his allies and creating a Treasure Chest that could give Mario unlimited coins.
The opening sequence of Super Mario RPG: Legend of the Seven Stars features a Magikoopa boss and an army of Terrapins in the Forest Maze fighting Mario, Mallow and Geno. This Magikoopa, however, never appeared in the final game. However, this Magikoopa is present in the game's hidden debug menu, which can only be accessed by a Game Genie code. The Magikoopa may have only been part of a demo presentation of the game.
 Paper Mario series
 Paper Mario
Kammy Koopa is Bowser's right-hand minion in Paper Mario, and Magikoopas appear as rare enemies. One first appear in Shooting Star Summit, and they are later encountered in Bowser's Castle. They maintain their teleportation abilities in this game, appearing and disappearing randomly and making it easy for them to get a first shot on Mario. Some Magikoopas also ride broomsticks, and have to be knocked off before Mario can hit them with his Hammer. Many sub-species are also introduced in this game, but regular Magikoopas are the strongest, having all the powers of the sub-species, although the one fought on Shooting Star Summit doesn't appear to be a major threat.
 Paper Mario: The Thousand-Year Door
Magikoopas are once again enemies in Paper Mario: The Thousand-Year Door, however this time they can be encountered much earlier. A trio of different colored Magikoopas can first be found in Glitzville, and standard blue Magikoopas appear later in Rogueport Sewers after being scattered from a Superbombomb blast at the end of Chapter 5. They have the same battle plan as in the first Paper Mario, and also retained the ability to make "copies" of themselves.
 Super Paper Mario
Magikoopas return in Super Paper Mario, starring in The Bitlands and Castle Bleck. They are also present in Bowser's Castle and the wedding chapel at the beginning of the game. Additionally, while still at Bowser's Castle, there is one generic Magikoopa standing by his side when he is giving his minions a motivational speech before they head off to kidnap the princess; this may possibly be Kamek. Also, in the Flopside Pit of 100 Trials, Dark Magikoopas, a subspecies of Magikoopas, are introduced. They shoot spells to harm the player and can be defeated by the usual stomp. However, even if the player stomps a Magikoopa, its magic attack generally is still launched. Magikoopas are seen either standing on the ground, or riding brooms overhead.
 Paper Mario: Sticker Star
 Mario & Luigi series
 Mario & Luigi: Superstar Saga
In Mario & Luigi: Superstar Saga, Magikoopas appear in Bowser's Castle, which had been hijacked by Bowletta. These Magikoopas attack Mario and Luigi by shooting large, spinning rings of fire at them and they would also boost themselves or other enemies' health or increase their stats. They appear on the Adventure Field.
Psycho Kamek also appears in Superstar Saga. He lives in Little Fungitown, and hypnotizes Luigi into thinking he is Mario, thus making him brave enough to go on a daring mission to save his brother, who is sick with Bean Fever.
This game is also the debut of Magikoopas' modern white-brimmed caps.
 Mario & Luigi: Partners in Time
Although no normal Magikoopas appear in Mario & Luigi: Partners in Time, Kamek plays an important role as Prince Bowser's attendant throughout the story. He serves as a boss of the Yoshi's Island segment of the game, being fought prior to the brothers entering Yoob's Belly.
 Mario & Luigi: Bowser's Inside Story
In Mario & Luigi: Bowser's Inside Story, Bowser saves a group of imprisoned Magikoopas inside a cage in Princess Peach's ruined castle. After he rescues them, they'll teach Bowser his last Special Attack called Magikoopa Mob, where he throws fireballs to the Magikoopa's wands to power their blasts towards the enemy. There are also enemy Magikoopas which resemble Fawful called Magifoofas. There's also a Magikoopa that helps Bowser after the player defeats him the first time (he also teaches him the punch and flame). There is also two (unless they're the same one) in the credits, and one that tells Bowser about the package Princess Peach sends.
 Mario & Luigi: Dream Team
Magikoopas reappear in Mario & Luigi: Dream Team where they appear in the battle against Giant Bowser. Kamek makes an appearance as the tertiary antagonist of the game, often appearing alongside Bowser and Antasma, as well as the Elite Trio.
 Mario Kart series
 Mario Kart 64
 Mario Kart: Super Circuit
 Mario Baseball series
In Mario Superstar Baseball, Magikoopas are playable characters, originating on Wario's team. They use their scepters as their bats, and Red, Green, and Yellow Magikoopas appear as alternate color schemes for the games' playable Magikoopa.
In Mario Superstar Baseball, each Magikoopa has good fielding abilities, and some of them have average batting skills. However, all of them are very slow, and are poor pitchers.
Magikoopas also appear in Mario Super Sluggers, but are part of Bowser's team instead. Like in Mario Superstar Baseball, they use their scepters as bats, and come in blue, red, green, and yellow variations. Unlike with the predecessor, though, their pitching skills have greatly improved, but their batting skills are weaker than before. They are still very good fielders, but their running skills are still very poor, with the Red Magikoopa having the slowest running skills (tied with King K. Rool). Magikoopas don't exactly have good stamina, since they get exhausted rather quickly when they let up a few big runs. Ironically, the Red Magikoopa's bio states that it has good stamina, which contradicts with its actual pitching behavior.
 Super Princess Peach
Magikoopas appear during the boss fight with Giant Kamek in Super Princess Peach, mistakenly being called Kameks, their Japanese name. Here they appear flying on brooms, sometimes holding Vibe Crystals that can be stolen if the Magikoopa is defeated.
 Mario Party series
 Mario Party 8
In Mario Party 8, Magikoopas appear in Shy Guy's Perplex Express and Bowser's Warped Orbit. In Shy Guy's Perplex Express, the Magikoopas appear when a player lands on a Green Space. They shuffle the train cars by moving the first one to the very back of the train. In Bowser's board, the Magikoopa mixes up the candies of all the players. It is unknown whether these Magikoopas in the game are Kamek. But since two of the voices in Fun Bazaar are named after Kamek, the Magikoopas in the game are believed to be Kamek.
 Mario Party 9
A Magikoopa is one of the Bowser´s minions in Mario Party 9 along with Shy Guy. In the Solo Mode he appears randomly in the boards, and if he or Shy Guy wins, the player has to play through the board again. But if they tie with the player, the player moves to the next stage.
When the player finishes Solo Mode, Magikoopa will become a playable character. In the PAL version, this Magikoopa is called Kamek.
 Mario Party: Island Tour
Magikoopas are set to appear in the upcoming game Mario Party: Island Tour. Not much is shown at the moment.
 Mario & Sonic at the London 2012 Olympic Games
In the Wii version of Mario & Sonic at the London 2012 Olympic Games, a Magikoopa (possibly Kamek) appears before the start of the Dream Equestrian event, it looks through a telescope to view the finish and starting line and then head down to the starting line where the competitors begin. Thoughtout most of the event, it will use its magic to cast or summon fire rolling haystacks towards the players. At the entrance of cave, Magikoopa will also use its magic to cause speleothem to drop from the ceiling at the players, until it crashes into the wall. In the 3DS version, Magikoopa also appears as a rival in BMX, where Sonic the Hedgehog faces him.
The Magikoopa is also a ? Mark effect in London Party, it removes some of the player's stickers.
 Other Appearances
Several Magikoopas appear as spectators in the Bowser's Castle course in Mario Power Tennis.
In Super Mario Chess, Magikoopas appear as bishops on Bowser's team.
 Physical Features
Magikoopas have curved, beak-like mouths like average Koopa Troopas, but with more pronounced noses and fangs; in addition, they also have claws. They all wear glasses and wizard robes that cover all their body, leaving sometimes only their feet uncovered. Underneath these robes they wear a black undershirt. Most wear wizard hats (though Kammy Koopa wears a witch's hat). Their clothes can be found in many different colors, such as yellow, white, gray, and green, though the most common is blue. Prior to Super Mario Galaxy, the only parts of a Magikoopa's robe that were colored white were the sleeve rims, with only a few exceptions in the Mario & Luigi series. As of Super Mario Galaxy, all the Magikoopas' hats have been given white rims. Magikoopas can summon broomsticks to fly on, and they all have scepters to cast their spells. Their scepters originally had white shafts with a blue ring and a red ring forming the base of the small green jewel at the end. The current scepter design is of a yellow (supposedly golden) shaft with a larger red jewel set in the end.
In Super Mario Galaxy, they can turn into small white energy orbs to travel faster. They will do this periodically during battle, making them harder to hit close-up.
Magikoopas may have shells, although since they have never been seen without their robes this is unknown. Kamek, a Magikoopa, in Mario & Luigi: Partners in Time, says the Mario Bros. are starting to "chap [his] shell" after taking Baby Bowser's treasures (as an expression), so it is assumed Magikoopas have them.
Unlike most other Koopas, Magikoopas fight by casting spells, not by walking into the player.
 Official Profiles and Statistics
 Paper Mario Information
 Mario Baseball series
 Mario Super Sluggers
 Names in Other Languages