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.
It’s extremely friendly toward you. It couldn’t possibly love you more. It’s a pleasure to see! (250+)
It seems to be very happy. It’s obviously friendly toward you. (200-249)
It’s quite friendly toward you. It seems to want to be babied a little. (150-199)
It’s getting used to you. It seems to believe in you. (100-149)
It’s not very used to you yet. It neither loves nor hates you. (50-89)
It’s very wary. It has a scary look in its eyes. It doesn’t like you much at all. (1-49)
This is a little hard for me to say... Your Pokémon simply detests you. Doesn’t that make you uncomfortable? (0)
Source: The Magical Serebii