beat Clair
First of all, make sure you have a hibernation cave. Then, select the dragon you want to hibernate. Click 'move'. A green arrow should be pointing to the hibernation cave just like when you move dragons to different habitats. Click on the hibernation cave. Your dragon should now be sleeping in there. To get it out of the cave, click 'move' again and select a habitat. I hope that helps.
you have to get the ruby and Sapphire rock
The cave is in the back of Sootopolis city but there is a old man blocking the way, and I am having trouble getting the man to move.
You have to beat the elite 4 first. Then he will disappear
answer: Use the move Cut.question: But where do I find the move cut?answer:
Use the move Rock Smash.
you must complete your REGULAR pokedex to get mewtwo in the cave
You have to beat the elite four, and then he will move out of the way. You can also catch Mewtwo in there, in case you don't know.
Because Polyphemus is the only one who can move the big rock that is blocking the cave.
Use the move Rock Smash.
In Pokémon White 2, in order to get the Crustle in the Seaside Cave that is blocking your way to the Plasma Frigate to move out of the way is to find Colress in Route 22. Once you are at Route 22, you will see both Colress and Terrakion however you will not be required to battle Terrakion at the present time. Once you interact with Colress, he will give you his Colress MCHN which will allow you to move the Crustle that is blocking your way in the Seaside Cave.
First you buy the breeding cave and then you choose which dragons you want to be breeding with eachother by clicking on The breeding cave