To collect comics from Toys R'Us, first, sign up for their newsletter to get alerts about new comic arrivals. Secondly, go to the store regularly and browse the entertainment section where comics are usually placed. You could also ask the store manager if they can order specific comics for you.
It depends. If they don't violate copyright laws and are not for commercial purposes, they might be okay. But if they copy official content without permission, it's likely illegal.
There aren't any. The Pokemon world is focused on adventure and friendship, not such inappropriate content. Such comics would go against the nature and values of the Pokemon brand.
I'm not entirely sure which specific 'day r entire comics and stories' you are referring to. There could be many independent or niche comics with such a name. Maybe it's a very specific or new creation that I'm not familiar with.
You can start by doing a general search on the internet using the exact phrase 'day r entire comics and stories'. Check on comic - related websites and forums too.
First, you need to have a clear story idea. Decide on the characters, their adventures, and the overall plot. Then, start sketching out rough designs for your Pokemon characters and the scenes.