parappa the rapper would be cool to have in bl
dunno if anyone here really follows keroro tho, most people here who do watch anime watch less simplistic ones that have deeper/bigger conflicts or just more mature themes overall, ex yuri on ice, madoka, gurren lagaan, klk, one punch man, etc
just do what you want to make, as a modder you get to decide. just understand if you fulfill things more requested by the community it would see more use.