The fourth event-specific berry is the Rowap Berry. Not legally obtainable currently, though; it should come about some time after the Jaboca Berry does... --- I am a die hard Pokemon fan to the most, including the traditional hate of Yu-Gi-Oh.
The stat-raising berries can be gotten in Join Avenue if you have a high-ranking flower shop set up. Only issue is that each flower shop tends to have different wares available, so you'll have to put some time and effort into getting them. --- Black 2 FC: 4342-1045-6517 Trainer Name: Enigma http://i.imgur.com/6DdDc.gif