In the Rank 3 fight with Sonic Juice, the RPG Travis talks about hating is most likely Final Fantasy VII.

•The song before the fight is very similar Final Fantasy's "Prologue" theme, while the battle music seems to be a parody of Final Fantasy's battle music.
•The game is mentioned as being beloved by "everyone and their mom."
•Travis mentions he wouldn't play it even if they remade it.
•The style and layouts the menus match Final Fantasy.
•Ifrit, Bahamut, and Knights of the Round are all referenced in the Summons.