Giving dugtrio sand force instrad of arena trap
I dont think the opponents going to change Pokemon,
Thinking it would obviously have arena trap,
And I can attack with higher power
If they are predictors, they might suspect something by running a sandstorm with dugtrio as it doesn't help unless it had sand force. If they are smart enough after that they'll try to switch Pokemon and find out it works. The sandstorm makes it obvious. There are also users like me who forget dugtrio have arena trap and just switch out not even noticing.