Originally posted by WhiteYoshiEgg
YY-CHR can edit graphics files (what the 8x8 tiles look like); Lunar Magic's map16 editor can edit map16 files (how those 8x8 tiles are arranged into 16x16 tiles).
Does the thing you downloaded come with an ExGFX file, did you insert that file and load it in your level, and does it contain the graphics you need? If so, you can just use the map16 editor to rearrange the tiles, as BlueToad described. If not, you will first need to make an ExGFX file (or open an existing one) in YY-CHR and draw the graphics you need.
Nope, no ExGFX were involved. The blocks came with a map16 file, so I imported them and got this. I will try to use my ExGFX.
Originally posted by BlueToad
You can enter
8*8 editing mode and fix all the wrong graphics yourself in Lunar Magic, you don't need to mess with YY-CHR.
This doesn't change anything, since the (problematic) custom tiles themselves are badly drawn, broken.