1) Read the LVL file specification about blocks settings:
http://engine.wohlnet.ru/docs/_SMBX64/f ... iption.pdf
2) Open level file in SMBX editor, and check the necessary block coordinates in debugger.
Warning, you must set it accurate, by left-up corner of block
and set number of need NPC:

0 - block is empty, 1-99 - block contains coins by 1 to 99, 1000+ - block contains NPC with ID= value-1000. I.e. if value=1056, block contains NPC-56.
NPC List in PDF: http://engine.wohlnet.ru/docs/_SMBX64/O ... 20List.pdf
NPC List in ODS: http://engine.wohlnet.ru/docs/_SMBX64/O ... 20List.ods
Result: (after saving LVL file via notepad, you must start level test without saving, or ReOpen same file in menu file/open):