miken park: It's fine.
Shining Vortex: It's fine if you've made the banner.
Pyrax: It's perfectly ok if you've made the image.
Babey blue: You are allowed only 2 pics. Your Butterfree image is 300x200, you should make it 2 images of 200x200 next to each other and remove the other 2 if you want to keep that one, or if you want to keep the other 2, remove the Butterfree one. Also credit the pics if you haven't made them yourself.