Magikoopas made their debut in Super Mario World, where they teleport around and shoot magical blasts with their wand. The blasts look like a sparkly conglomeration of geometrical shapes and damage Mario on contact. They keep this behavior in later games such as Super Mario Galaxy and Super Mario 3D World. Common Magikoopas, unlike their leader Kamek, rarely ride brooms.
Magikoopas appear as relatively tough enemies. They fly around on their brooms and move by teleporting around and swooping forwards. They attack by shooting either a single magical projectile or a trio of them (telegraphed by the Magikoopa doing two rotations) which lower a random stat on contact.
The 3DS trophy of a Magikoopa seems to conflate the Magikoopa species with the individual Kamek; this is likely due to the fact that they share the same Japanese name. However, Kamek also appears in the Yoshi games while common Magikoopas are restricted to Mario games.
Kamek and Kammy Koopa, two different Magikoopas, appear as Spirits for the game's Spirit mode.