It's worth noting that while Penguin Wars only has Japanese support, most of its menus are in both English and Japanese. The only stuff that's purely Japanese is the dialogue in Story Mode and descriptions of things that are easy enough to deduct from context. I'd say the game is pretty import friendly, and worth grabbing if you have fond memories of Penguin Wars / King of the Zoo on the Game Boy or NES.
Also City Connection's other Japanese-only game, Soldam, eventually got an update with English support, followed by a localized release on the US eShop. I have my fingers crossed that'll happen for Penguin Wars down the line as well.
Also City Connection's other Japanese-only game, Soldam, eventually got an update with English support, followed by a localized release on the US eShop. I have my fingers crossed that'll happen for Penguin Wars down the line as well.