Board Thread:Fun and Games/@comment-28680672-20180428053603/@comment-25856498-20190104154611

66. Fun fact (but long one): The secret Codec Conversations in Ultimate are unchanged from Brawl. As a result, the conversations about some of the characters may be a little awkward: for instance, conversations on Jigglypuff and Sonic reference Brawl, and the talk about Pokémon Trainer uses masculine pronouns even though Pokémon Trainer gained female skins. For characters that were not in Brawl, the conversations don't exist - the normal down taunt will simply be played instead.

This is not without a likely reason - Takeshi Aono, the voice actor for Roy Campbell (in the Japanese language), one of the people in the conversations passed away in 2012, and as such the character was retired from the Metal Gear franchise, meaning no new conversations could be made.