We know Wikipedia never lie......... ever!!!!
Just Googled it and this is fromWiki
As an ecozone, Oceania includes all of
Micronesia,
Fiji, and all of Polynesia except
New Zealand.
New Zealand, along with
New Guinea and nearby islands, part of the
Philippine islands,
Australia, the
Solomon Islands,
Vanuatu, and
New Caledonia, constitute the separate
Australasian ecozone. In geopolitical terms, however, New Zealand, the Solomon Islands, Vanuatu and New Caledonia are almost always considered part of Oceania. Australia and
Papua New Guinea are usually considered part of Oceania along with the
Maluku Islands and
Papua in Indonesia.
Puncak Jaya in Papua is often considered the highest peak in Oceania.