By the same token, the NES version of the game only features George (King Kong) and Lizzie (Godzilla). Ralph didn't make it onto this 8-bit system.
The game has originally three characters: George (King Kong), Lizzie (Godzilla) and Ralph (Wolfman). But the Atari Lynx version featured a fourth character named Lester, a giant Ratman, who could join in the fun since the Lynx had 4-player support.
When one of your fellow players has been killed and drops back to the lowly state of human, eat him. You can continue to eat from this spot and fully revitalize yourself. (Make sure to quickly get back to this spot after distroying the current city, so that you can enter the next with full health!)