Jeffy is always a bad character so why can't Marvin be the main villain of Jeffy's 20th Birthday? Marvin would get fed up with Jeffy in a fit or rage and kick him out, then he'll team up with Brooklyn Guy so he can kill him and be rid of him for good. Rose would stop Marvin and save Jeffy because she always defends Jeffy even though he's a bratty jerk.