Rad Oncie is a "to be made" Once-ler that was announced to the creator's ( aslyummm ) friends in real life. As only the concept was made, there is not much to put here.
However, aslyummm says that this once-ler will probably be an annoying aesthetic memelord.
More info will be put here after more information is found on him.
The tumblr has been created, but it still under construction. ( Here )