I will design characters according to you. You can use those characters for your games. Sizes colors everything will be modified. I have made a lot of games for android and iphone. Buttons of the game can also be made according the theme and can be modified. Per character cost will differ. Low detailing character will cost $5 and high detailed character will cost $10 and may exceed also. Line art, doodles, sprite sheets everything can be done.
Format which will be given - png/ jpeg high resolution 300 dpi or more
Animation of the character can also be done on extra amount depending on the frames required
The character designed by me are wholly made by me and will not be copied from anywhere so there will be no problem of copyright.