Cease Fire
During gameplay, in the main menu, go to the "Diplomacy" menu, then to the "Input Message" menu. Enter "koufukushimasu" ("Surrender") in katakana, then return to the main game menu and choose "END".
View All Enemy Units At Start
At the title screen, hold Left + B + Select. The cursor will cycle between menu items: press A such that you choose "1P Game." This will let you view all enemy units at the start.