[TM in Obsidia Ward]

Is this tm currently obtainable and if so, how do you get to it? It's been bothering me for a while.

[Way to change weather?]

So is there still a way to change the weather? I've seen the tutorials on youtube on how to change weather but none of them worked for me. If there isn't, can someone trade a male corsola to me? 

 

Also I'm new to the forums so if I did something wrong with my post location or something please let me know. Thanks!