Base Link (often shortened to just BL) is the solid foundation on which all X-stats values are based. What every value on the All-Time X-stats Listing is saying is "this is the percentage of the vote that this character would manage in a direct matchup against Base Link."
Comparision Between Years Edit
The idea behind BL is that Link remained constant between 2002 and 2003, then gained in 2004, 2005, and 2006. Link's exact strengths on BL are
50% -> 50% -> 53.38% -> 54.56% -> 56.33%
The numbers behind each of these adjustments were calculated by creativename using a method known as Least Squared Differences. You may need to be high on LSD to understand exactly how this method works, but it does.
Aside from Link himself as mentioned above, the following characters/games/series have earned the distinction of "Link-beaters," having finished above 50% on BL.