I think the only potential "issue" with the two Super Mario Land games is that they're not Miyamoto products like all the rest (well aside from SMB 2, obviously).
In the Mario Anniversary Edition for the Wii with the booklet that chronicled 25 years of Super Mario, they didn't even mention the Super Mario Land games. <_<
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Thank you, Eddie Guerrero.
http://img.imgcake.com/Icon/Punkjpguh.jpg