User blog comment:Exotoro/So Much Smash News/@comment-25395573-20140815145325/@comment-860254-20140816004600

he hasn't made a mainstream appearance in Mario since SML2 for the Game Boy. SML3 was Wario Land, and can't exactly be considered as "Mario"

also, Chain Chomp was originally designed for Zelda, then the design was used for SMB3