Advance Wars 2: Black Hole Rising/COs

Andy
Andy's units are all 100% capable in offense and defense, making them entirely average.


 * CO Power: "Hyper Repair"  Restores 2 HP to all units, +10% defense to all units (110%)
 * Super CO Power: "Hyper Upgrade"  Restores 5 HP to all units, +20% offense to all units (120%), +10% defense to all units (110%), +1 movement range for all units (+1)
 * Unlocked by: default

Max
Max's direct combat units (excluding infantry and mech units) receive +20% offensive capability, but his indirect units have -10% offense and -1 firing range.


 * CO Power: "Max Force"  +20% offense for all direct combat units (140%), +1 movement range for all direct combat units (+1), and +10% defense for all units (110%)
 * Super CO Power: "Max Blast"  +40% offense for all direct combat units (160%), +2 movement range for all direct combat units (+2), and +10% defense for all units (110%)
 * Unlocked by: default

Sami
Sami's infantry and mech units have +30% offense and capture buildings 1.5 times more quickly and her transport units all have +1 movement range, but her direct combat units suffer -10% offense.


 * CO Power: "Double Time"  Infantry and mech units gain +20% offense (150%) and +1 movement range (+2), and all units get +10% defense (110%)
 * Super CO Power: "Victory March"  Infantry and mech units gain +50% offense (180%) and +2 movement range (+3), and may capture any building in one turn, regardless of health. All units get +10% defense (110%)
 * Unlocked by: default

Nell
All of Nell's units may randomly do up to 10% more damage.


 * CO Power: "Lucky Star"  All units get increased luck and +10% defense (110%)
 * Super CO Power: "Lady Luck"  All units get substantially increased luck and +10% defense (110%)
 * Unlocked by: beating Campaign mode with an A rank or higher

Hachi
Each unit's cost is lowered by 10%.


 * CO Power: "Barter"  Each unit's cost is lowered by 40% (50% of original) and all units' defense is +10% (+10%)
 * Super CO Power: "Merchant Union"  Each unit's cost is lowered by 40% (50% of original), land units may be purchased and deployed from cities, and all units' defense is +10% (+10%)
 * Unlocked by: beating Hard Campaign mode

Olaf
All units are immune to any movement penalties carried by snow, but have the movement penalties in rain that other COs experience in snow.


 * CO Power: "Blizzard"  Changes the weather to snow for one day and all units get +10 defense (110%)
 * Super CO Power: "Winter Fury"  Inflicts 2HP of damage onto all enemy units, changes the weather to snow for one day, and all units get +10% defense (110%)
 * Unlocked by: clearing the Blue Moon segment of Campaign mode

Grit
All indirect units receive +20% offense and +1 firing range, and all direct combat units (excluding infantry and mechs) receive -20% offense.


 * CO Power: "Snipe Attack"  Indirect units receive +30% offense (150%) and +1 firing range (+2) and all units receive +10% defense (110%)
 * Super CO Power: "Super Snipe"  Indirect units receive +30% offense (150%) and +2 firing range (+3) and all units receive +10% defense (110%)
 * Unlocked by: clearing the Blue Moon segment of Campaign mode

Colin
Each unit's cost is -20% but all units suffer -10% offensive capability.


 * CO Power: "Gold Rush"  Funds are multiplied by 1.5 and all units get +10% defense (110%)
 * Super CO Power: "Power of Money"  The damage each unit does is increased by 1% for every 300G the user has at the time the power is used. Note that this is calculated by multiplying the damage by the amount of addition (e.g. with 1500G in pocket, an attack that normally does 56% damage would do 59% damage and not 61%.)  Additionally, all units get +10% defense (110%)
 * Unlocked by: purchasing either Olaf or Grit at Battle Maps