http://www.netrover.com/~timt/cheats/p/pitfighter.html (Amiga Plus Extra No. 5/97, 05/1997)Start the game and type "LOBSTERS", use the numeric key pad '1', '2', and '3') to advance to the corresponding level. Then try these keys:
'L'---------For elimination round
'G'--------------For grudge match
'C'--For final championship round