Imao, i'll take it
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You seem to be looking for the database.
You can find your database in that toolbar at the top of the screen, it's one of the icons. The database is where you make things like characters (heroes or actors), items, monsters (Pokemon in your case), and common events. Just take a look around there >.>.
If you are a newbie to RPG maker, then it's probably not a good idea to make a pokemon game until you understand the entire system. Pokemon games in rpg maker requires some knowledge of actors and the battle system and that might be a couple notches above your level.