Just about since we first got them both as Ralts, really! So I wanna say its been well over a year. That was one of the first Pokemon that Elsa caught, so...it's been a long time coming. You should see them fight together, though, he's so noble and he always does his best to protect her and make her happy... It really motivates him!! I think they make for a great couple! Odin and Frigga...heck, we even named them after Norse gods who became a husband and wife, so I guess them pairing off was kind of destiny.