Heads up, people!
I got word from an internet friend that CloudFlare had a serious data leak recently. Paypal and Amazon were among those affected, as well as a long list of others.
Not sure if Serebii.net is connected to CloudFlare, but it's best to be safe--better change your passwords pronto!
(Myself, I normally update my passwords near the beginning of each month, but this news has made me update them sooner.)