Wow, you only have to glance on that and the first things that stick out are all the red boxes in the water and steel column. @_@
I'm a little confused as to anything else.
Look at the numbers to see what's what. The light green and pink boxes are changes from the original setting.
And I think he put Grass supereffective to Electric because Grass needs another potential target, Electric was not very effective when attacking Grass already, and Grass could strike an electric type and disable their electricity, meaning more damage.