Carrybee

Carrybee is a invulnerable airship that dispenses enemies in the desert of Mega Man Zero. It appears in Fefnir's stage which is to protect the Resistance from a large attack. AFter defeating a number of troops, it'll appear dispensing Pantheons, Kerberos, and Shellcrawlers. After defeating or evading the reinforcements, Fefnir jumps out and challenges you.

Carrybee G
Carrybee G is a modified Carrybee that dispenses Pantheons in Mega Man Zero 3. It's no longer invulnerable.