>>21822836To get Regigigas, you need to do the following
>Capture all three Regis>Have it be daytime. If night, it won't work.>Bring all three Regis to Island Cave>Have Regice hold the Castelia Cone (You can get Castelia Cone either in the Trick House (with all other regional delicacies including Shalour Sable) or by showing Regice to a girl in Mauville Hills)>Have Regice have a nickname, only Regice needs it. 