I would like to find them just to check on a Pokemons 'return' tm usuage basically.
This was asked before here.
>Location: Verdanturf Town
In the lower-leftmost house, you will find this lady.She will look at the Pokémon in the front of your party. She will tell you how happy it is with various statements. This can be done any number of times throughout the day.
Serebii has extra info