Akumu.
there is no such thing as a phantom nightmare. you can't just make up random phrases and expect them to be translated to japanese.
'Ningyou Akumu Shiryo
bad dreams warui yume nightmare akumu
最低の悪夢 now all done
Akumu is nightmare. The Kanji for it is 悪夢
"Watashi wa Akumu desu". But it wouldn't make sense to a Japanese speaking person... I guess we don't express things that way..
悪夢 (akumu)
悪夢 (akumu)
In the Algonquin language of Canada the tern for a nightmare is nikinekgowin.
Cauchemar
incubo
Nightmare in Dreamland is a remake of Kirby's Adventure, so I would say that Nightmare in Dreamland is better.