HOT STUFF:

Debug mode:
Press and hold START + SELECT (I think it's better to pause the game before
trying the code. The game keeps running normally and the continue or quit
options during the pause may confuse you!) and then press one of the 
following keys for the desired effect:

L1 = Slow motion
L2 = Stop
R1 = Some weird debugging info
R2 = Stage Select (arrows up and down to select and X to choose)
UP = A strange map (really don't know what it is)
DOWN = Hallo + 99 lives + 3 1970's + 3 swirlies + 7 special weapons (only
the ones you already have) and 20 bullets
TRIANGLE = map coordinates, go anyhere (square makes you go really faster)
do it again to return to normal, or you won't be able to finish
the stage.
CIRCLE = some strange lines, maybe mapping stuff
X = same thing
SQUARE = try it, I don't remember (don't feel like turning on my PSX
right now)

Then release START + SELECT and enjoy,
In the stage selct mode there are 2 pages of options, just scroll down.
You can see all stages, intros, ending and all FMV.

Submitted By: Vftor Harada


LOTS OF LIVES:

to start up with 86 lives go to the passward screen and 
press R1 L1 R2 L2 R1 L1 R2 L2 R1 L1 R2 L2
OR WHILE PLAYING THE GAME PAUSE ITAND PRESS THE FOLLOWING CODE         
LEVEL SKIP : T L1 S R C T D 
MAX LIVES:L1 T D L C SEL S R
SHIELD: R2 C C D L C R D 
BULLETS :D C U R2 L T SEL SEL
PLEASE DO TRY THE FOLLOWING 
CODES IF THEY DO NOT WORK

Submitted By: anubhav


PASS WORD:

Go to password screen and put in this:.
R1,L1,R2,L2,R1,L1,R2,L2,L1,R2,R1,L2.
This will take you to the very first level,Not The Science Center.
It's Called the Skullmonkeys Gate.  

Submitted By:: Douglas Clayton


AN EASY WAY TO DEFEAT GLENN YNTIS:

As soon as you reach the world and coplete the 3 or 4 levels in YNT
eggs, you'll come across Glenn Yntis.  He is probably the hardest
boss in the game.  To kill him just as easy as the Shriney Guard,
line the "cannon boat" to his unblocked legs and the pain forces him
to leave his chest open.  Quickly attack his chest, and then the hard
part!  You'll notice he has a smaller claw with a larger one.  When you
see his small claw pointing to a spot on the rope, pause it and check
where it's pointing.  Avoid the spot where his claw is pointing so his big
claw doesn't blow up Klayman.  As soon as you unpause the game, press
start immediately to a spot to avoid this area.  You'll know what I mean
once you try it, it's quite easy to get!

A "LIVES" SECRET IN "THE INCREDIBLE DRIVY RUNN":

In preparations for the hardest levels, Evil Engine #9, the level
called "the Incredible Drivy Runn" (it's a "horse"-riding level) 
holds a ton of easy-to-get clay balls.  Get to know the clay ball
arrangements and get as many of them as you can.  When you come
the flying skullmonkeys that drop "bombs", purposefully jump down a
hole or jump into the enemies themselves.  You'll start over at the
beginning of the level to collect a second large set of clay balls.
Repeat as much as you need.  BE WARNED EVIL ENGINE #9 IS THE HARDEST
LEVEL!!!  (Worm Graveyard, a fairly easy level, is before this though)

Submitted and FULLY tested By: Nick Smith