Wait, ... did that actually happen? I mean, there's no way that would fly in the American version, but still...
yeah basically XD if it were translated properly it would be something like PALKIA YOU FUCKIN' IDIOT!! or PALKIA YOU ASSHOLE!!! it was パルキアのばか!! but said with such force in this case cursing would be best (japanese doesn't have real "cursing" so you can improvise).
in the japanese "electric shock showdown" lt. surge shouts GOD-DAMN! in english. oh japan!!