Crossbyne is an enemy from Mega Man Zero 3 and Mega Man Zero 4. In Mega Man Zero 3 it appears in a room in the Aegis Volcano Base (Blazin' Flizard's stage) and Energy Facility (Devilbat Schilt's stage). They teleport around the room and fire shots in the 4 intermediary or basic directions. In Aegis Volcano Zone there is a countdown, and they appear and disappear for 30 seconds. After that they will be destroyed and will not reappear until Zero plays the level once more. There is a set number that appears, so they can all be defeated before the time is up, sort of like a time trial challenge.