Hardcoded GFXs

[mariobrigade2018]

Does anyone know where I could find these Hardcoded GFXs.

[Just_Thomas]

These are custom made. If you want to know WHO made them, try to find a map using them and look for credits (if not mentioned the map author most likely made them him/herself).
I know that reads totally stupid now. But that's not what I meant.
In the case of SMBX, a good screenshot (PNG or BMP) is conveniently already the corresponding "texture" or tile (if you exclude complex parallaxing backgrounds) and your screenshot does look promising.
Actually, you only have to halve the resolution, because all graphics are normally doubled in resolution (tilesets, backgrounds etc.).

The hardcoded graphics are in this folder:
[your installation path of SMBX] ...data\graphics\hardcoded
the itembox is: hardcoded-48-0, marios red 1up display hardcoded-33-3 and the numbers .. these are tricky to change sometimes
(either hardcoded-50-... or hardcoded-45-2)

Since I do not know right now what YOU do know, I simply told you in detail.
So, simply ignore the parts of my reply whose contents you are familiar with.