Here's an example of an early work of the famed Japanese animation studio, Tokyo Movie Shinsha (TMS; was just Tokyo Movie when this show aired): Kaibutsu Kun (1968 - Little Kaibutsu/Little Monster)
I never saw the black-and-white show but I did see the color remake that aired in the eighties. The main kid is a prince of Monster Land who wound up in the human world, along with Dracula, Werewolf, and Frankenstein's monster ("Franken" in the show). They befriended a human kid whom he always helped.
One of the things I remember was that they rented an apartment room right next to the aforementioned human kid and his older sister's (their parents are apparently dead), but it was empty except for a refrigerator which was really an opening to a tunnel that led to the spooky house the monsters were really living in (I think there was a reason for it, but I don't remember)
The Werewolf had two character designs: the human form in daylight and the wolf form in night. The two designs were used interchangeably depending on what part of the day the scene took place.
The titular character was otherwise normal looking except that he had an ability to stretch his limbs like rubber and also transform his face into something else by waving his hands on his face repeatedly (as seen in the clip I linked above).