What does it do? Does it just make you feel good inside? Or is there actually an in-game benefit for it?

It make's you feel good inside. :P

Also there's an achievement for releasing 1000 of them. I think there's a new site layout as a prize (Luminaire).

It make's you feel good inside. :P

Also there's an achievement for releasing 1000 of them. I think there's a new site layout as a prize (Luminaire).

Thanks a lot for the response! I guess I'll just keep collecting them then~

It was important during an event last year, but now it's basically just an achievement as far as I know.

Thanks for this post! Now I know to release them when I catch one!

Thank you cause i just collected them.