Mangs (also known as Magnus Hestsveen) is the biggest and most well-established Advance Wars youtuber in the world and as a result he has an almost 10 year history of voicing the characters while he records himself playing these games. His natural talent and sigma grindset has build him an audience of almost 100k loyal fans, who tune in to his channel every day to hear the characters, they all know and love, come to life through the soul and passion that embeds his voice. (They don't watch him for the game play, trust me, bro.)

This voice acting talent has also landed him the role as Scotpalazzo in the infamous Sonichu comic dub on the youtube channel  "End, Thus I am".

So now the only question remains to is ask why Mangs needs to voice Flak specifically. Why not Max? Why not Sturm? Why not Jess? I'm glad you asked, and the reason might be more obvious than you think.

Flak's entire personality revolves around being strong, reckless and simping for goth girls. These are all personality quirks that Mangs relate to on a personal level since he likes to be reckless even when he plays turn-based strategy games and also simps for zodiac girls and Nagatoro.

And also, I mean, just look at them. They are basically twins. He is basically made for this role