A Japanese publication has unintentionally leaked information about Nintendo's newest game "Pokemon Sun and Moon" ahead of its official release.

CoroCoro Comic has revealed two new Pokemon on its July 2016 issue, Nintendo News reported.

The first one is named Nekkoala, a Normal-type Pokemon with the ability Definite Sleep. According to the comic, the Pokemon weighs 43.9 pounds and is approximately 1.3 feet tall. The Nekkoala, as it name implies, looks like a real koala, and is hugging what looks like a small tree stump.

Serebi.net webmaster Joe Merrick confirmed that with the Definite Sleep ability active, Nekkoala can only be inflicted with the sleep status, and can't be burned, paralysed or poisoned.

Nekkoala might also be a combination of the Japanese word for falling asleep (nemuru or neru) and koala, according to Redditor WatashinoTurn31.

The second one is Puppy Pokemon Iwanko, a rock type Pokemon with the ability Keen Eye or Vital Spirit. The Pokemon weighs 20.3 pounds and is approximately 1.6 feet tall. It has brown fur, blue eyes and a big fluffy tail.

Iwanko is probably a combination of the Japanese term for rock (iwa) and puppy (wanko), Redditor WatashinoTurn31 also said.

Iwanko would be familiar to fans who have been following the "Pokemon Sun and Moon" rumor mill since the beginning. The Puppy Pokemon was briefly shown at CoroCoro's trailer for "Pokemon Sun and Moon" in May, and was spotted by eagle-eyed Pokemon fans.

Since Nekkoala and Iwanko are Japanese names, these may not be the same names as the North American version, and may be subject to change once it launches in the US.

Corocoro has also revealed details of the upcoming "Pokemon" movie, according to Nintendo Everything. The Japanese publication said that the Greninja event at the movie (based on the recently concluded Pokemon Election) has the ability Protean, Hydro Pump, Gunk Shot, Mat Block and Happy Hour.

"Pokemon" fans who will see the moving will be given a QR Code, which can be used to summon Magearna using the "Pokemon Sun and Moon" QR Scanner. Magearna will already be at level 50, will have the Soul Heart ability and the Furuuru Cannon move.

"Pokemon Sun and Moon" will be released for the Nintendo 3DS on November 18.