Mobile Suit Gundam - Zeonic Front Cheats

If you want the easy way to beat the Mudrock on level 10 this is the way
you do it. After you destroy the spaceship and you get to the Mudrock go
to the bridge that connects where you are and the Mudrock is. [Make sure
you have somebody with a heavy shield] DO NOT GO ACROSS THE BRIDGE
YET!! 
When the Mudrock starts firing on you STOP. Your guy should
automatically put up his shield. Once this happens order your guys to
full attack. Your guys will now go attack the Mudrock. Don't worry about
them. The idiot Mudrock will just keep shooting at you.

Successfully complete the game, then play practice mission 1 with Austin's Zaku 1. Successfully complete it and you should have a heavy Fed shield like the Gundam's, and a few new supplies.
Game Shark Codes
Master Code (Must Be On) 0E3C7DF2 1853E59EEE8D117A BCCAB6C2
Unlock All Pilots DEADBF86 BDAA9C84DEADBF82 BDAA9C84DEADBF8E BDAA9C84DEADBF8A BDAA9C84DEADBF96 BDAA9C84
Unlock All Simulations [Note] DEABC3AA BFAC9E86DEABC3B6 BFAC9E86DEABC3B2 BFAC9E86DEABC3BE BFAC9E86DEABC3BA BFAC9E86DEABC346 BFAC9E86DEABC342 BFAC9E86DEABC34E BFAC9E86DEABC34A BFAC9E86DEABC356 BFAC9E86
All Missions Rank S [Note] DEABC242 BDAA9C84DEABC24E BDAA9C84DEABC24A BDAA9C84DEABC256 BDAA9C84
All Simulations Rank S [Note] DEABC086 BDAA9C84DEABC082 BDAA9C84DEABC08E BDAA9C84DEABC08A BDAA9C84DEABC096 BDAA9C84DEABC092 BDAA9C84DEABC09E BDAA9C84DEABC09A BDAA9C84DEABC0A6 BDAA9C84DEABC0A2 BDAA9C84
Note: You may have to start a new game for these codes to work.

These are only that which I have personally seen unlocked, there are many more rumored, but I have yet to confirm them.

*For most of these you'll need to have beaten the mission mode at least once.

Unlocking EFF Shield(like that of Gundam and GM's)-After completing the game, successfuly complete practice mission 1 with Austin's Zaku I

Unlocking Lt. Commander Garret Schmitzer with his MS-05S Zaku I custom-Simply Complete the mission mode once

Unlocking Char Aznable and his MS-06S "Red Comet" Zaku II Custom-On simulator mission I "Practice" receive an A or an S ranking

For Garma Zabi and his MS-06Fs custom-Receive an A or an S in simulator 2-Practice II

For Ranba Ral and his YMS-07b Gouf-Complete the entire mission mode a second time up through at least mission 8

For Gaea of the black Tri-Stars and his MS-09 Dom-Complete up throug mission 12 a second time

For Agar in his guncannon completecomplete mission 10"Attack jaburo" a second time
In addition, complete simulations27 through 31 with an A or S to receive Agar;s RX-78-4 Gundam madrock

For Sayla Mass in the RX-78-2 gundam, receive a C or less in three seperate EFF simulation missions

For Amuro Rei, in the RX-78-2 receive an S in all EFF missions

I know Kai and hayato are selectable, but am unaware of precisely how to achieve them, if all of the afformentioned is completed, you should receive tham as well.

These are only that which I have personally seen unlocked, there are many more rumored, but I have yet to confirm them.*For most of these you'll need to have beaten the mission mode at least once.Unlocking EFF Shield(like that of Gundam and GM's)-After completing the game, successfuly complete practice mission 1 with Austin's Zaku IUnlocking Lt. Commander Garret Schmitzer with his MS-05S Zaku I custom-Simply Complete the mission mode onceUnlocking Char Aznable and his MS-06S "Red Comet" Zaku II Custom-On simulator mission I "Practice" receive an A or an S rankingFor Garma Zabi and his MS-06Fs custom-Receive an A or an S in simulator 2-Practice IIFor Ranba Ral and his YMS-07b Gouf-Complete the entire mission mode a second time up through at least mission 8For Gaea of the black Tri-Stars and his MS-09 Dom-Complete up throug mission 12 a second timeFor Agar in his guncannon completecomplete mission 10"Attack jaburo" a second timeIn addition, complete simulations27 through 31 with an A or S to receive Agar;s RX-78-4 Gundam madrockFor Sayla Mass in the RX-78-2 gundam, receive a C or less in three seperate EFF simulation missionsFor Amuro Rei, in the RX-78-2 receive an S in all EFF missionsI know Kai and hayato are selectable, but am unaware of precisely how to achieve them, if all of the afformentioned is completed, you should receive tham as well.

Successfully complete the game, then play practice mission 1 with
Austin's Zaku 1. Successfully complete it and you should have a
heavy Fed shield like the Gundam's, and a few new supplies.