Combining the regular coloured drones in various different ways will enable you to create special drones that are more powerful.
Line Drone
Created when you match 5 drones, line drones will clear out an entire row or column of drones.
Bomb Drone
Created when you match 6 drones, when bomb drones are set off they match all surrounding drones.
Prism Drone
Created when you match 7 drones, prism drones instantly wipe out any drones that have a matching colour when they get moved into them.
Triple-Dipple Super-Duper Drone:
Line drone + bomb drone. Clears out three lines at once.
Super-Duper Line Drone:
Line drone + line drone. Functions like a line drone but sends out a blast in every direction!
Super-Duper Bomb Drone:
Bomb drone + bomb drone. Works like regular bomb drones but covers a much larger area.
Super-Duper Line Prism Drone:
Line drone + prism drone. When you move this onto another regular drone ALL drones of that colour will turn into line drones.
Super-Duper Bomb Prism Drone:
Bomb drone + prism drone. This drone replaces ALL drones of the colour you match it with bombs.
Super-Duper Prism Drone:
Prism drone + prism drone. Clears the entire board.
Regular Coloured Drone with a Question Mark
If you combine a regular coloured drone with a question mark you will gain a random super drone.