Question

Where do I obtain TM43 Secret Power in Ruby?

Answer 1

Non-repeatable
- Route 111 (From a boy near a Secret Base tree)
Repeatable
- Slateport City (P 3000; after obtaining TM43 at Route 111)

TM043 - Bulbapedia

Answer 2

Go a little way up from Slateport past the desert. When you find someone standing in front of a tree, talk to him. He will give you secret power.