Movie: Men In Black-Who was the actor that looked like Riff Raff from Rocky Horror with the dog Frank the Pug?

In Men In Black there was a character that stood beside Frank the Pug that talked. He looks exactly like Riff Raff (Richard O'Brien) in The Rocky Horror Picture Show. IMDB does show Men In Black on Richard O'Brien’s filmography, nor does his name appear in the cast list for Men In Black. The character is uncredited, and I would really like to know who it is, as well as settle a bet with my son. Thank you.