Realistic possibilities given a coup or no coup here and there?
France (Vichy)
Spain
Turkey
Yugoslavia
Far less realistic possibilities but not absolutely impossible
Iraq (too hard for any Axis-leaning non-European nation to join the Axis without immediate invasion by Britain or US)
Argentina (ditto)
Switzerland (surrounded and unhappily coopted by Axis)
Sweden (ditto)
I don't see any in the Pacific/Asia. Everybody there was already in the war one way or another by virtue of being a possession, protectorate, or lackey of the western powers or Japan. Japan could have created a fictional "ally" or two out of Indochina, Indonesia, or the Philippines, I suppose, but this really would just be a change in colonial rule, not a true ally.
France (Vichy)
Spain
Turkey
Yugoslavia
Far less realistic possibilities but not absolutely impossible
Iraq (too hard for any Axis-leaning non-European nation to join the Axis without immediate invasion by Britain or US)
Argentina (ditto)
Switzerland (surrounded and unhappily coopted by Axis)
Sweden (ditto)
I don't see any in the Pacific/Asia. Everybody there was already in the war one way or another by virtue of being a possession, protectorate, or lackey of the western powers or Japan. Japan could have created a fictional "ally" or two out of Indochina, Indonesia, or the Philippines, I suppose, but this really would just be a change in colonial rule, not a true ally.