To post emoticons, theres a smiley picture in your editor. Click on that and you have all the pre-loaded emoticons. If you mean ONIONS like this....
>> ITS HERE << XD
Oh and for the riddles, its under OFF-TOPIC > GAMES > Solve that riddle (For mine *Somehow I turned that into my own thread XD*) OR ROUND SHOULDER FLAT HEAD(For Cure-kun's). OR Alternatively, you can create one and post a riddle of your own!!!!