Can Charm move a unit from one player's battlefield to an opponent's battlefield if the unit doesn't have Ganking, and does this start a combat with the moved unit as attacker?

Ruling: Charm can move a unit to an opponent's battlefield regardless of whether it has Ganking. This will start a combat with the moved unit as the attacker.

Nuances:

• Ganking only matters for Standard Move actions
• Other movement effects follow their printed movement restrictions; otherwise they have none (except illegal locations)
• The moved unit is the attacker because it contested the opponent's battlefield