Towelket: One More Time 3

Towelket: One More Time is a japanese series of free indie RPG games made on RPG Maker 2000 by Kanao, first released in 2008. It features cute graphics mixed with a strange, fantasy-ish atmosphere akin to Earthbound; although with occasional guro and dirty jokes, giving it a charming unevenness. Most of the main games involve aliens invading the world and attempting to harm humans, with the main party being tasked with saving the earth.

The main character and their sister Kimiru are shrunken by the mysterious power of a magical book. At that time, the Kisechu, a group of tiny aliens bent on conquering the Earth, appear! The main character's allies must band together and defeat the six fish-hat leaders of the Kisechu to put a stop to their evil ambitions.