I've cooked up some alternate appearances for Peach and Toad. Peach's requires some minor Luna just to make sure everything is sized properly, but Toad is a simple recolor.
The Peach sprites were based off an MFGG sheet, so credit to that, while I edited it into all of the different forms. The Toad is just an extensive (and occasionally tricky, but mainly fine) recolor of the SMBX sprites.
Here's some screenshots for you. The originals are beneath them for comparison. Some of Peach's forms are based on her SM3DL appearance.
Both players include .pngs and .gifs, so you can use them with SMBX1 w/ Luna, or with SMBX2.
In order to get Peach to work properly, you'll have to add a little code to your luna, to get it to use the .ini files. Now, I recently had some computer issues and lost the file that I had with the code in it (it was given to me by someone else). If anyone could be so kind as to tell me what code makes regular characters use .INI files, I'd so greatly appreciate it.
Without further ado, the download.