What are you meant to do at Tanoby Chambers/tanoby ruins in 7 island?

Alright, Once you solve a puzzle, you can catch the different types of Unknown is the Tanoby Chambers, Ruins. I'll Walk you through the Puzzle. You will need the move Strength. From Seven sland, go down to The Canyon Entrance. Make your way throught the canyon untill you get to Sevault Canyon. Climb some Stairs, and travel Southdown past a two cooltrainers that fight you in Double Battle style. Here also is Where you can get Skarmory, Larvitar, and Phanphy in the grass. Anyways, Climb down the long set of stairs and down a skinny set and you should see a cave entrance in the upper left of the little lot your in. Enter that cave and inside will be seven boulders. you will see a ledge. Move the bottom boulders to the side. Next Move to the three middle boulders, move the center one up four steps. Now move one of the Boulders next to the one you just moved. Move the left boulder one step and the right boulder two steps. Now walk to an indent above two rocks, not boulders. Push the two boulder next to you on thier respective indents. Now push the remaining boulders onto their indents, and you should hear a sound. Now you are free to catch as many Uknows as you want. Happy Trails.

Don't listen to Cheat Wizard, he/she's lieing through their teeth. The only way you can catch Mew (without cheating) is through a nintendo event which don't happen any more. So Cheat Wizard, if you would kindly stop spouting lies that would be great.

Dont bother trying to get all the unknowns just catch 1 to fill your Pokedex. Who knows maybe there is a legendary sleeping Pokemon like the man said at the tonoby ruins or it's just unknowns if you think mews there or a legendery Pokemon good luck trying to get all the unknown have fun if your bothered so yeah good luck