ok well i'm about to have to redo the png optimization for Secret Maryo Chronicles 1.5 and i wanted to know what you recommend to do. I was going to use OptiPNG but i wasn't sure what options to use to get the best optimization without messing up the graphics.
If you use the same compression method and save format for all the images, you can use any tool you'd like and then just try it... if it works, you're good.
If you use a tool that uses different methods for each image depending on how well they compress... you need to test *EVERY* image in the app to ensure that the app can still read it correctly.
Sometimes, the impossible can become possible, if you're awesome!