Talk:Spar/@comment-2003:DD:6F45:7D00:BCBC:2046:3B91:268F-20190519192437/@comment-46014317-20200709082044

 Yup. To unlock the achievement you simply have to defeat 32 different characters, doesn't matter who.

 For example; In my game Mint and Siwa aren't available yet but I fought Huss and Tuss during mission. That unlocked the achievement too.