Robotech - Battlecry cheats and cheat codes for Gamecube

Cheat mode
Choose the "New Game" option in the main menu. After, 
hold L + R + Z  and quickly press 
Left, Up, Down, A, Right, B, Start

The cheat entry screen will appear. Enter any of 
the codes below:

All multi-player stages: Enter "MULTIMAYHEM" as a code.
All paint schemes: Enter "MISSMACROSS" as a code.
All veritechs and medals: Enter "WHERESMAX" as a code.
Disable cheats: Enter "CLEAR" as a code.
Invincibility: Enter "SUPERMECH" as a code.
One-shot kills in sniper mode: Enter "SNIPER" as a code.
One-shot kills with gunpods: Enter "BACKSTABBER" as a code.
Quick gunpod and missile refresh: Enter "MIRIYA" as a code.
Quick Gunpod refresh: Enter "SPACEFOLD" as a code.
Quick Missile refresh: Enter "MARSBASE" as a code.
Reverse mode: Enter "FLIPSIDE" as a code.
Stage select: Enter "WEWILLWIN" as a code.


Invincibility
Go to fighter training, destroy 2 targets, after leave.
Go to story mode and you should be invincible.

Bronze Cross medal:
Destroy 50 Battle Pods. 

Distinguished Service medal:
Complete the Enemy Within mission. 
This also unlocks the Rick mech colors. 

Gold Cross medal:
Complete the Silver Cross medal set and destroy 100 Battle Pods. 

Gold Nova medal:
Complete the Vengeance mission three times. 

Jolly Roger medal:
Complete the Party Crashers mission three times. 
This also unlocks the Skull Leader mech colors. 

Master Airman medal:
Destroy 100 Fighter Pods. 

Meritorious Service medal:
Complete the Force of Arms mission. 
This also unlocks the Izzy mech colors. 

R.D.F. Flying Ace medal:
Complete the Master Airman medal set. 
This also unlocks Debris Field versus mode level and Max mech colors. 

R.D.F. Starburst medal:
Complete all Boss missions two times. 
This also unlocks the Flood City versus mode level. 

R.D.F. Supernova medal:
Complete Gold Nova medal set. 
This also unlocks the City In Space versus mode level and the Patriot mech colors. 

Robotech Marksman medal:
Kill 50 Nousjadel-Ger in Sniper Mode. Note: This also unlocks the Stealth mech 
colors. 

Silver Cross medal:
Complete the Bronze Cross medal set and destroy 75 Battle Pods. 

Silver Shield medal:
Use the VF-1A to complete the Graveyard mission. 
This also unlocks the Graveyard versus mode level and Miriya mech colors. 

Southern Cross medal:
Complete the Gold Cross medal set. This also unlocks the Factory versus mode 
level and the Armored Valkerie in versus mode. 

Superior Defense medal:
Complete the Attrition mission. 
This also unlocks the Graystone versus mode level. 

Titanium Medal of Valor medal:
Complete the Knife's Edge mission. 
This also unlocks the VF-1J in story and versus modes. 

Tuna Head medal:
Kill 50 Del Regults. 
This also unlocks Queadluun-Rau in versus mode. 

Wolf Leader medal:
Complete the To The Death mission. This also unlocks the VF-1R in story and 
versus modes and the Wolf mech colors.