Appearances Advance Wars: Dual Strike
Specialty Firepower
Affiliation Yellow Comet
CO power Knuckleduster
Super CO power Haymaker
Power Meter AdWar-SmlAdWar-SmlAdWar-SmlAdWar-MedAdWar-MedAdWar-Med
Hits Donuts(/Octopus Balls)
Misses Planning


Grimm (Japanese: コウゾウ, Kouzou), nicknamed "Lightning Grimm", is a Yellow Comet CO with a dynamic personality. He couldn't care less about the details, especially insignificant little things like defence. Consequently, his daredevil nature raises his attack power, but his carelessness about the details or planning attitude lowers his defense.

CO abilities

Grimm's Units have 130% firepower, but only 80% defense.

CO power

Knuckleduster - Increases Grimm's Units' firepower to 160% and defence to 90%.

Super CO power

Haymaker - This power grants his Units 190% offence and 90% defense.

Tag Breaks

Grimm has Tag Breaks with the following COs:


Dual Strike


"Things are looking Grimm for you! Haaaaar!"

"What a pencil neck!"

"Gwar har har! Go cry like a little girl!"

Campaign, Pre-Battle

Final Battle

"That gigantic blob thing is no joke... Well, I bet I can still smash it!"

(with Sensei)

Sensei: "Ah, Grimm, my old disciple. You've grown quite a bit during these battles... If you agree to train the rest of these rookies, I can finally die happy... If the battle ends poorly, you must escape! I can't outlive my finest student!"

Grimm: "Escape? Gwar har har har har! Sensei, we still need you back home! If you die on us, we're in big trouble! You're going home if I have to pick you up and carry you!"


Grimm's weak defense makes him one of the most difficult COs to play as in the game. To play Grimm effectively, you must make full use of Grimm's ability to destroy enemy infantry on roads with his tanks or artillery and play aggressively.

In competitive play, Grimm is not one of the best CO's. Less defense for you means more offense for the opponent. Combine the 30% offense with the 20% defense, and it's only a 10% net offense. Low defense makes it harder for your Infantry to capture properties. On the upside, it is also true that vehicles and Copters are devastatingly powerful during his Super CO Power. However, Jess is often preferable to Grimm in ground battles due to the movement boost (in addition to just a firepower boost).


  • His ability similar with Campaign Mode Sturm in first Advance Wars except he doesn't have movement cost of 1 for all units.
  • Hachi in the Battle Maps shop, praises Grimm for being offensive without having pricy units like Kanbei, but also notes that his portly figure is because of donuts. 
    Advance Wars Dual Strike Grimm's Theme-001:29

    Advance Wars Dual Strike Grimm's Theme-0


Orange Star: AndyMaxSamiNellHachiJakeRachel
Blue Moon: OlafGritColinSasha
Green Earth: EagleDrakeJessJavier
Yellow Comet: KanbeiSonjaSenseiGrimm
Black Hole: FlakLashAdderHawkeSturm
JuggerKoalKindleVon Bolt
Yellow Comet
COs: Grimm | Kanbei | Sensei | Sonja

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