[Babul]

the "\B" is a non valid escaped code. if you want to make one string in a line, use the / slash, if you want it to be in 2 lines (to click a team), then this is better:

pawn Код:

CMD:getskin(playerid, params[])
{
    ShowPlayerDialog(playerid, DIALOG_MAIN, DIALOG_STYLE_LIST, "Skin help panel", "Grove\nBallas", "Select", "Close");
    return 1;
}

you simply forgot the to-be-escaped "new line" code: \n