Wily Capsule

Wily Capsule (ワイリーカプセル) is the teleporting saucer that Dr. Wily rides and uses for combat after the destruction of his Wily Machine. First appearing in Mega Man 4, it is the final form of Wily in said game and onward, which torments Mega Man for the rest of the classical series. It was at its strongest in Mega Man 7. In Mega Man 5 it's called "Wily Capsule II", in Mega Man 6 and 7 it's simply called "Wily Capsule", and in Mega Man 8 it's called "Wily Capsule Great" (ワイリーカプセルグレート).

Transport
Dr. Wily's spaceship transport doesn't has a official name, but is usually referred by fans as Wily Capsule. It's also called "Wily Saucer" to differ it from the machines used in boss fights. It first appeared in the first game with a red and yellow color, and the red color was changed to blue in Mega Man 2 to 7 (not seen in Mega Man 6) and the Game Boy games. In Mega Man: Powered Up he uses it to kidnap the original "8" Robot Masters (including Time Man and Oil Man). He usually doesn't directly battle Mega Man using only the saucer, except for Mega Man IV (referred as Wily Capsule due to being a boss) and the ending of Mega Man V, but Wily attached it in most of his Wily Machines.