As the name of the topic said, I made list of all missing flags so it´s (probably) last wishlist. Here it is:

American Samoa
Aruba
British Indian Ocean Territory
Burkina Faso
Cayman Islands
Comoros
Eritrea
Equatorial Guinea
Falkland Islands
French Guiana
Greenland
Guyana
Isle of Man
Kiribati
Lesotho
Marshall Islands
Martinique
Mayotte
Micronesia
Montserrat
Nauru
Niue
North Korea
Northern Mariana Islands
Pitcairn Islands
Saint Martin
Saint Pierre and Miquelon
Sao Tome and Principe
Sierra Leone
Solomon Islands
Somalia
Timor-Leste
Turks and Caicos Islands
Tuvalu
United States Minor Outlying Islands
US Virgin Islands
Vanuatu
Vatican City
Wallis and Futuna
Yemen

+ Manitoba, Newfoundland and Labrador, Nova Scotia, Nunavut, Prince Edward Island, Yukon