Hey Motorteo, welcome to the forums. This question would be better suited for the On the Hunt forum. Also, please come tell us about yourself in the Grand Hall with an introduction!
I'm assuming you don't speak English very well? Otherwise we have to ask you to not use chatspeak.
As for your question. You can go to the Agate Circus, where you fought Samson, and if you go south from the main tent, you can talk to a clown at a stand who will tell you to solve a puzzle. The Froakie one. If you can do it correctly, you will be given Dive as a reward.
A tip for the future. You can also use the search bar above your 'Member Info:' to the left to search the forum for specific things.