Does talking to your Pokémon increases friendship in HGSS?

Question

I think I heard an NPC in the game telling me about the connection of talking to your Pokémon and it's friendship level, but I can't correctly recall and I'm unsure.

Answer 1

These 2 pages don't say that talking to Pokemon changes friendship, so I think it's almost certain that talking to Pokemon does not change friendship.
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Comments

It can get you the Shiny Leaf tho