This Territory as a whole does not have a true nickname, or state nickname, but has a derivative or short-form from part of its' name. It is called "The Territory" by nearly all "Territorians" (another example). "Northern" is nearly always omitted in these references by locals in everyday conversation.
"The NT" is also commonly used, with the emphasis on "The", but this is still not a true nick-name such as mentioned below.
The northern part of the Northern Territory is called the Top End, and the southern part containing Alice Springs and Uluru/Ayers Rock is often called the Red Centre, and less commonly but affectionately, The Central Heart Of Australia.
People living in the Northern Territory of Australia have been referred to by the rest of Australia as Territorians for as long as anyone there can remember.
Top-Enders has had some usage, but is uncommon, though certainly Darwin and the northern area of the Territory is often referred to as the Top End.
There are other nicknames given to inhabitants of most parts of Australia by inhabitants of other parts of Australia, but they tend to be localized, idiosyncratic and frequently not intended to flatter those referred to: some Queenslanders, for example, speak of southerners - and specifically those from New South Wales - as Cockroaches, while southerners in their turn have been heard to refer to Queenslanders as Cane Toads.
Queenslanders don't seem to mind, and routinely catch and perform taxidermy on cane toads, putting them in interesting positions, mounting them on bases and selling them to tourists. I haven't heard of a similar trade in cockroaches, but am prepared to believe anything of southerners.
South Australians are sometimes known as Crow-Eaters, while Western Australians can be called Sandgropers and, in their turn, refer to the rest of the world as the Eastern States And Overseas.
The Northern Territory is a territory and therefore is not known by any other name or any particular state.
The northern portion is referred to colloquially as the Top End and the central region is colloquially known as the red centre.
Tasmanians are sometimes called "Taswegians".
This Territory as a whole does not have a true nickname, or state nickname, but has a derivative or short-form from part of its' name. It is called "The Territory" by nearly all "Territorians" (another example). "Northern" is nearly always omitted in these references by locals in everyday conversation. "The NT" is also commonly used, with the emphasis on "The", but this is still not a true nick-name such as mentioned below. The northern part of the Northern Territory is called the Top End, and the southern part containing Alice Springs and Uluru/Ayers Rock is often called the Red Centre, and less commonly but affectionately, The Central Heart Of Australia.
The Northern Territory does not have an official motto. The northern region is unofficially known as the Top End, while the southern desert regions are known as the Red Centre. Some websites will report that the motto is "The Never-never", but this is not the case; nor is this nickname restricted to the Northern Territory.
The question proceeds from a false assumption. There is actually no "Sunshine State" of northern Australia. The Australian state with the nickname of "Sunshine State" is Queensland, but it is not regarded as being in any part of Australia known as 'northern Australia'. Queensland takes up the entire northeastern quadrant of the continent, but it is not regarded as a 'northern state' by Australians.
Connecticut.
Australia is in the Southern Hemisphere
The nickname was the BleedingKansas
Northern Illinois State sports teams go by the nickname of the Huskies. There are several other universities that also use this nickname.
northern or southern lights
Legends!
Socceroos
Dolphins