In Platinum, where on Route 209 can I find TM 19 (Giga Drain)?

Question

I've spoken to every person I can and I searched just about everywhere.

Answer 1

The Giga Drain TM is on a tiny clearing of land off a river on Route 209. You can get to this route by going east out of Hearthome City.

This text tutorial has step-by-step screenshots that guide you the whole way. The TM's exact location is shown in the image below (taken from the same tutorial link).

Answer 2

• You need to use Surf on 209.

It's near one of the rocks.

This video from Youtube tells you exactly where to find it.