that definitely shouldn't happen, upload your save file here so that someone can eventually help you

Its because of sturdy

So, I was going through the game and I couldn't find the TM for Shadow Ball. Apparently I played the version where we got the TM Shadow Claw instead. Can someone help me here please? Game - 2379 - Seppey - 358h 3m - 14 badges.rxdata

Yup! All I did was move you past the barrier, hope that helps!   In the future, interacting with the rock formation i circled thats on either side of the barrier will open/close it

I would suggest Dugtrio and/or Sandslash.   Persian with Power Gem is quite strong against Shelly, too.