師匠、Punのサンプル改造してやったらできまひたお
if (photonView.IsMine)
{
object[] objectArray = { "1", "2" };
collision.gameObject.GetComponent<PhotonView>().RPC("DestroySpaceship", RpcTarget.All, objectArray as object);

DestroyAsteroidGlobally();
}

public void DestroySpaceship(object[] objectArray)
{
print(objectArray.Length + ":" + objectArray[0]);