Yes, Steve Buscemi was indeed in Pulp Fiction. In the movie, his character contributed to the complex web of stories and characters. His performance was part of what made Pulp Fiction such a cult classic, with his unique acting style blending in with the other great performances in the film.
Your question is incomplete. The Ring of the MMOs is the name of a novel. I don't know what you want to know about this novel. If you can provide more information, I will try my best to answer your questions.
In Pulp Fiction, Buscemi's role was important as it helped to flesh out the complex web of characters. His interactions with other characters, like his fellow criminals, showed the different dynamics within the criminal world presented in the movie. He brought a certain nervous energy to his part which was quite memorable.
The Godfather features a different set of actors. Steve Buscemi is not part of the cast of The Godfather. This classic movie has actors like Marlon Brando, Al Pacino, etc. Steve Buscemi is known for his roles in other movies and TV shows, but not in The Godfather.