You go into your toribash folder, open your replay folder, right click the replay you want to add emotes to, open it in notepad, go to the frame you want the emote to come up, and under the ANGVEL of that frame, type EMOTE 0; *insert text here* for tori to talk, and EMOTE 1; *insert text here* for uke to talk. Save and watch!
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Thanks for the comments guys!