There hasn't been a "final showdown" yet. Ernie's most recent bout w/ Peter happened in the last episode of Season 10, Internal Affairs.
It was suggested there might be another fight in the Family Guy/Simpsons crossover episode that is apparently slated to air in the Fall of 2014, but that may have been a joke told by Steve Callaghan.
The Final Showdown has 144 pages.
The Final Showdown was created on 2004-11-01.
The cast of Final Showdown - 1979 includes: Rey Malonzo Henry Sapungan as himself
The Final Showdown - 2006 was released on: USA: 29 December 2006 (Sacramento, California) (premiere)
a laser cannon
A Chance to Dance - 2012 The Final Showdown 1-5 was released on: USA: 2012
There is no such game as "Super Mario Final Showdown." No game with that title has been released, nor has a game with that title been announced.
LA Ink - 2007 Final Showdown 3-13 was released on: USA: 1 October 2009
Operation Repo - 2007 The Final Showdown 8-13 was released on: USA: 27 April 2011
Operation Repo - 2007 The Final Showdown 8-13 is rated/received certificates of: USA:TV-14
I Love Money - 2008 The Final Showdown 2-14 was released on: USA: 4 May 2009
I Love Money - 2008 The Final Showdown 3-12 was released on: USA: 1 December 2010