I've been trying to collect some information, and here is what I found:
http://community.casiocalc.org/topic/67 ... sio-scene/-> Shows clearly that Helder did not 'hack' into Casio Kingdom and make it redirect. Why would he not recommend people using them if he made it ?
-> Only posts/applications/usernames/passwords up to 2009 are imported from a backup according to the above link and data on varius forums.
Helder joined Planet-casio and Omnimaga on 24 December of last year. He started discussions together with flyingfish on the 2nd of January this year to backup Casio Kingdom. First they were just downloading what they could from the old site but on 13 April Helder managed to import a backup from Casio Kingdom. The source of this backup is unknown, most likely it is the backup that is talked about here:
http://www.110mb.com/forum/index.php?topic=49127. Also, that post dates back to three days before Sean stepped down and transfered ownership to Matt. Even if this wasn't the database, it could never have been dumped by Helder .. as so far as I know he wasn't active during this period.
I have yet to see anywhere proof that Helder did any hacking.