It's pretty simple. The most I need from you, is a front facing battle sprite, and a name for the enemy (Which should be put in the comment that's in the Sprite). The Enemy can be either an OC of yours, or a random thing you create just for this. Of course, if you want you can also add other details as well, such as the attacks the enemy does, any dialog that it says in battle. An Intro Cutscene, and an outro cutscene. Just keep in mind, that in the cutscenes, I can't give you much info about the protags, nor at what point in the game this is in. (Though I will say, the protags are Original, and have nothing to do with Ness or Lucas or Etc. And that it will most likely appear in the latter half of the game.). Also, if you do specify anything for the cutscenes, drawing Overworld Sprites would also make things easier, especially if you wish to do something more complex then just saying "Hi. Lets fight now.".