Hah - yeah, I'm just using default RTP graphics for (almost) everything until I can get the main parts of the game finished, and I had to shrink the battlers down using scripting to get them to fit for the time being. The actual graphics are going to be one of the last things I worry about, especially for situations like this that're going to require almost entirely custom built graphics.
... now that I look at it, I realize that player battlers aren't affected by the screen tone. I'm going to have to adjust the viewport they're draw on.