As a heads up:
Someone apparently nerded out on Dream Radar so hard he found the hidden codes to catch Beldum, Slowpoke and Hoothoot in Dream Radar, and now Serebii has them. I tried them (here in NA) and they all work. Enter at the 2nd screen (when you can normally begin searching). When using them, only 1 of them will appear even if you have 30 clouds (and no items will appear too), so I'd just save Play Coins and catch them when you have only 1 cloud you can "hunt". The codes:
Beldum (Sp. Extension A): Up (On D-Pad), Right, Down, Left, X, L, R
Slowpoke (Sp. Extension B): Up, Down, Left, Right, Y, L, R
Hoothoot (Sp. Extension C): R, L, Y, X, Left, Right, Y, X


