I personally use an array object and an external json file set up as a "c2array". That way I can edit the array file with ease in Notepad++, since editing arrays is a bit cumbersome within Construct 2. At the very beginning of the game I load the json file into the array through AJAX actions.
It is kind of intermediate/advanced stuff, and it only gets you part of the way there. Then it gets really complicated when you have to actually start using your database with the battle and stat formulas.