@echo off
set f1=list.txt
set f2=emotes.txt
set outfile=mix.txt
type nul>%outfile%
(
    for /f "delims=" %%a in (%f1%) do (
        setlocal enabledelayedexpansion
        set /p line=
        echo(%%a!line!>>%outfile%
        endlocal
    )
)<%f2%

pause