It's a bug. Smeargle isn't meant to be able to learn a second attack or be TM'ed. https://twitter.com/NianticHelp/status/1100455516973748229 Up 0 Down
I figured it was some sort of measure to keep smergle from gaining a second move until they figure out how to remove the option from him. Up 0 Down
Dang, I really wanted to pour resources into it so he can defeat the Shedinjas and Shuckles he would face in the new 300 CP limit Crud League. Up 0 Down