Some lines in the opening prologue stage for Star Fox: Assault contain allusions towards dialogue from Area 6, one of Star Fox 64's final stages. In the latter, Caiman says near the end that "The last line has been breached!", and the Area 6 commander will respond with "These guys are crazy!". In the Japanese version of Star Fox 64, the latter instead says "こいつら、化け物か！" (These guys are monsters!)

In Star Fox: Assault's prologue, one of the ape soldiers apart of Oikonny's rebellion will similarly shout that "Our final line of defense has been penetrated!". Oikonny in response says "Is this guy some kind of demon?". In the Japanese version of Assault, he instead says "コイツら化け物か？" (Are these guys monsters?), which makes it much more clear that it's meant to be a callback to Area 6's dialogue. This intention was confirmed by producer Takaya Imamura in a 2005 Nintendo Dream interview with Star Fox: Assault's development team.