Hey Super Sluths, I am completely stumped in a memory of a game I played before that may have been on here. The best way to describe it is the main character had a Purple-Haired, Pika-chu humanoid-like companion. It also played a lot like Pokemon in the fact you could go out, and capture other girl's as you traveled a pretty diverse world that had a beach area, lava area, forest area. The main overlay also wasn't pixilated and it was a very smooth interface for that matter so that rules out other options like haremon, and any type of Pokemon-rom hacks. Additionally, your grandpa was also a pervert leaving notes in his journal for you to find about how he'd make love to the girl's too. The last bit of remaining details I can shrug up about the story is that some Goddess granted human's the power to know the love of the creature's of the girl's she put into the world for us to adore, and enjoy. I really hope those details I gave help out, there were also boss characters you could capture, and one was like a Salamander fire-type chick, and once one of your girl's got enough experience points in battles they could also evolve. 

I don't think it was any of the Nutaku games, and nothing related to ero-mon if that can help narrow down your search too. Any help would be greatly appreciated. Another comparison I'm able to make is the graphics were pretty darn close to what Nexomon Extinction looks like as far as visuals go. Thanks for your help if you choose to go, and try to help me search for this rather elusive game I can't get off my mind that's driving me crazy. :c