386 pokemon chipsets???
ok first of all those are monsters chipsets or tilesets in rm2k3 are for making your maps. GO NOW to the resource thread.
I know youy want to make your own game but downloading others will help you get resources for yours, including a way to understand a bit of coding. You need winrar or winzip to open those zipped files, I use winrar and it's never failed me, search google.
-and stop asking where to get stuff there is a resource thread and a FAQ and this is deff a FAQ. I'm hope that didn't come across as mean :)