Is this acceptable? (Mario 3-style enemies)

I have some custom/edited sprites that are pending submission, I'd like to know if I've done this right or if I've broken any rules. There technically are some of the original unedited sprites here, but only for completion with animations and such. And as for the Nipper Plant, the enemies sheet on this site didn't have one, so I had to get one from SMA4 and color it with a similar palette, although the darkest shade of pink is wrong, as I couldn't find a single other graphic that used it with the layer 2 option in Paint, so I went with a Lava Lotus shade. Let me know if anything needs removed, please, or if I should just split this thing up (though I'd rather not). This was a several-month project, and technically is a WIP.

  Official sprite sheet TRUE - edition 1.png (Size: 236.74 KB / Downloads: 0)

  Enemy Sprite Icon.png (Size: 15.36 KB / Downloads: 0)