User blog comment:J1coupe/Banjo Kazooie vs. Donkey & Diddy Kong. Epic Rap Battles of Video Games Season 6./@comment-26842383-20140821034108/@comment-26261279-20140821172438

To explain the Expand Dong joke it's a joke of taking the titles of Donkey Kong's games and switching letters around to make sexual references. Like changing Donkey Kong Tropical Freezes cover to say Huge Tropical Orgy