Catskart wrote:The real last version is 1.3.
Depends what you mean by "real".
SMBX 1.3 is the last version made by Redigit.
SMBX2 beta 3 expands 1.3, but with a different development team. This one is generally considered semi-official.
SMBX 38A is an entirely different engine, rebuilt from scratch, to produce something similar to SMBX, with some extra stuff added in.