In Modes of Play with teammates, Battlefields occupied by a player’s teammates are Invalid Destinations for Moves of all kinds (Standard Moves or otherwise) by Units that player controls.
§ 447.2.b Core Rules PDF (officieel)
§ 447 Moving is defined by the Origin and Destination of the Permanent that is changing locations.
§ 447.2 The Destination is where the Permanent is going to.
