Can you move a ready unit from base to an opponent's battlefield and simultaneously move a unit with ganking from a different battlefield to the same destination, or does a showdown trigger immediately preventing the ganking unit from moving?

Ruling: You can move any number of eligible units simultaneously from different locations (including base and other battlefields) to the same destination as long as they can legally move there and you exhaust each of them. A showdown does not trigger until after all simultaneous movement is complete.

Sequence:

• Declare all units moving to the same destination
• Move them simultaneously from their different origins
• Exhaust each moving unit
• Showdown triggers after movement is complete

Nuances:

• Ganking only allows movement from one battlefield to another battlefield; the ability to move multiple units simultaneously is part of the standard move action, not specific to ganking
• Units can originate from any combination of locations (base, different battlefields) as long as the destination is the same and legal for each unit