How can I access the dark basement in Agate city to get the pattern and then how can I access the back of Charlotte;s gym. Youtube really doesn't help explain this.
you get acess to the dark basement after you defeat the meteor goons on the area, so you can get the item before or after Hardy, there should be a house with a kid .
There should be something like this ( this is actualy my notes to solve this puzzle ).
XOX XXX
XXX XOO
XOX XOO X XXX XXO
XXX OOX X XOO XOO
OXX OXO X OXO XXX
OOX XXX X XXX XOO
XXX OXO X OXX XXO
XOX XOX X XXX XOX
XOX XXX