That is an anti-tank unit (as mentioned earlier) which as the name immplies is strong against tank units or any other vhehicle for that matter.
It only exists in Advance Wars: Days of Ruin, but this sprite is in Advance Wars: Dual Strike style.
My fangame uses Dual Strike sprites as all the COs (Commanding Officers) from Advance Wars 1, 2 and Dual strike are playable.
It also uses Dual Strike sprites beacuse there were units in Dual Strike which got Removed in Days of Ruin.
Why do you ask?
EDIT: Forgot to mention that it's the only long-range unit which can counter direct-fire.
It only exists in Advance Wars: Days of Ruin, but this sprite is in Advance Wars: Dual Strike style.
My fangame uses Dual Strike sprites as all the COs (Commanding Officers) from Advance Wars 1, 2 and Dual strike are playable.
It also uses Dual Strike sprites beacuse there were units in Dual Strike which got Removed in Days of Ruin.
Why do you ask?
EDIT: Forgot to mention that it's the only long-range unit which can counter direct-fire.