"What do the two above have in common?" Game

^ and ^^ are females and born in the 90's

^ and ^^ have an water-type starter from an odd-numbered generation as avatar!

^ and ^^ both were ninja'd in Other Trivia ;)

^^ Both are girls and joined PC in 2012.

^ and ^^ both have the colour pink in their avatars.

Both are girls (granted that you can trust them to be set gender :p), has a postcount that starts with the number 2, and though they may not all be the same shades of the colours, they both have the colours black, blue and purple somewhere in their signatures.

^^ Both joined in 2010-2012 and are aged under 13.

^^ Both are girls and have themes featuring Unova characters.

^ and ^^ both have Unovan characters in their avatar. The same characters are also in their signatures.

^^ Both joined in months in the first half of the year.

^ Both enjoy Homestuck it seems.

^^ Those two are boys with avatars that match the signature.

^ and ^^ are older than me

^^ Both are Australian and joined in 2011.

^ and ^^ have more posts than me