[@Balthazar007]
Oh yeah, how exactly does the Pokémon Whistle work? Should I have Rin play a little tune and just wait for an interaction cuz it actually attracts weaker pokémon to their location, or do I just play it before going into the tall grass because it just makes it more likely the pokémon are lower level. 

Also, how much weaker exactly are we talking? Does it temporarily lower the Level Cap by some specific amount?