OK. First, go into multiplayer mode and select "Game Setup" and change the health mode to half. Then load Mission 25 (Well, Well, Well!) and jetpack on top of the Pillbox with the gunner inside, and skip turn, but DON'T hide. The purple gunner will jump out, hit your head, and he will either fall onto the side of the Pillbox, or fall by the poison water. His max health will be 37! Snipe him (or however the heck you want to kill him), and TADA! Survival bonus! Survival bonus on Mission 25 unlocks 'Mardy Pigs' (Team Purple), which is a mix of all countries featured in this game.

To do do this jetpack onto a philbox so the gunner
comes out and shoots at you, then just blow him up really fast.

To do this when the granade lands, press (X) twice super fast.

If you only have a healing rifle, and no recovery balls or anything, aim straight at the air. The bullet will go on to the air, and will heal you!

Take at least 3 spies into this level for awesomeness. Pickpocket the legends (They have ALL weapons!), and use these awesome weapons on these legends! Here are some awesome weapons I have stole from the legends: Shockwave; throws a hog into the air and then 'Skydive' back down. Damages 15 HP's.
Fire Rain Airstrike; Throws three pods filled with fire in, and burns the hogs. Fire takes 25 HP's.
Super TNT (THEY NEVER USE IT?!!); Disintegrates even the toughest of hogs. Damages 200 HP's.
Freeze Gas; Makes hogs miss a turn. A throwable gassing weapon, this can gas multiple hogs at once. Damages 20 HP's.
Suicide (WHAT THE..?); Similar to Shockwave, only it kills your hog, while blasting another hog away. Damage to HP's is unknown.

Enter all of these cheats as player names...

Team Lard
MARDY PIGS

All Movies
PRYING PIGS

Extra CG
WATTA PORK

Select a new game.
Call your team WATTA PORK, then play the training mission after the loading screen you will see 2 video clips then it will take you back to either the start-up screen or the men upgrade screen (it depends on you version of the game.
Select multiplayer, and choose a death match, then select a land called the play pen and choose all your men as paratroopers. Then start the game. you will see the video clips again, and voila. you will see the men upgrade screen and all your men will be commando's.

Enter NAUGHTY PIGS as a name.