well, thats because first, u didnt go past the 99 mark, and second, ure suppose to hold it, and if it did it right, it will flash for about 1 sec l.hand r.hand then it wil select the person u did it with, then u press b and do it over again, i only do about a max of 20, because it might screw up, and the dup glitch is:
put the item u want to dupin the TOP LEFT corner when u acsess the item screen
then u go into battle and go to items, and then press UP+A at thye same time, then if u did it right it should flass ure weapons,then it will select the charachter that used it, then u press B and repeat
Dance cat dance!
pknm freind code is: 1504 2890 4660 name is:Paine