Talk:Undyne/@comment-81.225.197.89-20151010141410/@comment-75.186.47.249-20151015022020

If you look at some of the cell phone w/ papyrus dialogue, there's a small little detail that hints her age as well as papyrus'.

https://youtu.be/TC3plNwe9SM?t=20m19s

Assuming the year is 2015 (obviously when the game was released, but he left it ambiguous with the "201x" thing)

And info from this video demonstrating the dialogue in question the names presented are:

Papyrus: COOLSKELETON95

Undyne: StrongFish91

In the early to mid 2000s it was pretty common to use the last 2 digits of your birth year in some usernames(can't say whether or not it's as common now). Going by this logic, we can determine Undyne to be 24 and Papyrus to be 20.

Either that or go by the kickstarter project start date in 2013 and just add 2 years to make Undyne 26 and Papyrus 22. Either one works.