No, it will not.
It only tells you how attached your Pokemon is to you and makes certain Pokemon evolve.
>It also affects the evolution of certain Pokémon, the power of Return and Frustration, and the availability of a few in-game items and Ribbons.
Also boosts the power of Return and Frustration. Maximum friendship maxes out Return's power, while minimum friendship maxes out Frustration's power.
The list of Pokemon that evolve through friendship is listed here. I won't type them all out because it is a long list, but some notable ones are:
- Golbat -> Crobat
- Pichu -> Pikachu
- Eevee -> Espeon (daytime)
- Eevee -> Umbreon (nighttime)
Hope I helped.