Specifically, this is the appearance of Whisper for the Shadowside series, 30 years after the original series.
- Yo-kai Watch: Wibble Wobble: Playable Yo-kai
- M04: Protagonist Yo-kai
- Yo-kai Watch Shadowside animation: Protagonist Yo-kai
- Yo-kai Watch 4: Befriending Yo-kai
This version of Whisper is pale and ghost-like, similar to his appearance in the present series, but he lacks the thick, black line between his eyes and the blue lips, though he does sport a similar, creepy grin.
He has purple hair on top of his head, which is in a wisp-like hairstyle. He also appears to have a hollow nose, similar to a skull, and two dark green eyes with yellow pupils. His ears are pointy, and his fully defined hands have long, sharp nails.
He wears a black suit that melts seamlessly into his ghostly tail, similar to Verygoodsir, with a white undershirt, and a pink bowtie.
This form has been referred to as his Shadowside form in promotional materials, and his Lightside form has never been shown.
Whisper is a major Yo-kai in Yo-kai Watch Shadowside: The Return of the Oni King.
After Lord Enma notices the danger that the Onimaro pose, he sends out Whisper with the Yo-kai Watch Elda, to find its chosen user and guide her in using it to defeat their enemy.
Yo-kai Watch Shadowside animation series
Yo-kai Watch: Wibble Wobble
- He shares his voice actor with the present version of Whisper.
- In Yo-kai Watch Wibble Wobble he is called "Whisper 2040", possibly referencing the year Yo-kai Watch Shadowside takes place in.
- This further proves that the original series is set in the 2010s.