2P!Hetalia: What it Is
Okay, so a rising thing in the Hetalia fandom right now is 2P and a lot of people don't really understand what it is, so I'm going to explain it.
ORIGINALLY, 2P was an alternative coloring and/or character design for the Nyotalia characters and the main Axis Powers that Himaruya made. These were posted on his website sometime around July 2011. The only one that became noticeably popular at that time was fem!Prussia and her 2P design.
NOW, the fandom has basically butchered that, as usual, and 2P is basically the characters in an alternative universe with more turmoil. Which, is unofficial, by the way. The way this whole "dark-side" thing originated is because Ameriko's character design carries a baseball bat while 2P!Ameriko carries a baseball bat with nails in it, assumed as a weapon. Also, a lot of the 2Ps have red eyes and darker colorings. So people have assumed that that meant they were the characters' dark side.
Speculation is that 2P!England is actually a good cook, as 2P!Igiko