Postby Julia Pseudo » Sun Jul 31, 2016 10:38 pm
Here's the breakdown of the SMBX versions floating around recently:
1.3 is the last official version released by Redigit, the original creator of the game.
1.3.0.1 is an updated version of 1.3 made primarily by Valtteri. It is the main supported version of SMBX by this site at the moment. It is cross-compatible with 1.3, as it is simply 1.3 with a hacked exe, a few fixed graphics, and higher-quality music.
1.3.0.2 is 1.3.0.1 with LunaLua built in, made by the Wohlsoft folks. It is all but officially supported by this site, as LunaLua is also supported. LunaLua, in case you're not aware, is an extension for SMBX that allows levels to execute Lua code within them, which allows a lot of new functionality to be added to the game if you learn to write Lua.
2.0 is currently in beta, and is a new version of SMBX in development primarily by Horikawa Otane, along with some other folks from raocow's talkhaus. It adds many new playable characters, along with new NPCs and potentially power-ups, as PixelPest mentioned. It also has built-in support for PGE, an alternate and much improved SMBX editor made by Wohlstand. It is compatible with 1.3 levels (though not the other way around if the new features are used) and will become the main supported version once it reaches its final release.
1.4, 1.4.1, and 1.4.2, also called SMBX by 38A or Chinese SMBX, are versions of an SMBX clone made by a guy named 38A. They are not quite the "real" SMBX and are a separate game that closely replicates SMBX's physics and content and adds a ton of new features, but is not compatible with 1.3 stuff. They are not supported by this site due to that last point.