Most marsupials have pouches. The pouched marsupials which are Australian animals include:
The brush-tailed possum, a pouched mammal (marsupial) of Australia, was introduced into New Zealand, where it has caused considerable damage to native forests.
The brush-tailed possum, a pouched mammal (marsupial) of Australia, was introduced into New Zealand, where it has caused considerable damage to native forests.
Koalas are marsupials, which are pouched mammals. Koalas are native to Australia alone.
Potassium
The element you are referring to is "Argon." When you remove the letters "t," "a," and "i" from the word "bandicoot," which is a nocturnal pouched animal, you are left with "b," "n," "c," and "o," which rearranges to form "argon."
Pouched mammals live in Australia because they were brought over from South America and because Australia is so isolated they didn't have any where to go.
The marsupial is an "antechinus", which is a small pouched animal like a mouse or shrew.
opossum
There is no animal with the same name as Australia.
The element is potassium. The animal is 'possum (actually spelled opossum).
In New Zealand, the common brush-tailed possum (introduced from Australia) is a marsupial which is extremely damaging to the forests.
opossum