Stuck at Jirachi Help Please!

im new on the forum in fact i registered just to get help for this problem i was enjoying myself in the game and once i was finished battling Odin (im playing Zeta Version btw) Jirachi popped up and i didn't know i would be able to catch it so i was unprepared but because of the hype i saved and was going to attempt to catch it so i lowered its hp and put it to sleep but when i wanted to try and chuck a pokeball at it i noticed that,i had NO pokeballs,and now im stuck because even if i let him beat all of my pokemon i just black out and then respawn infront of Jirachi with a full hp team,please help! i really want to catch Jirachi also i tried going back but it won't let me saying that Odin might go back on his promise and try to catch Jirachi for himself

Help,Anyone?

just restart the geame and instead of resuming with ur current progress go to save files and choose the second or third save file to resume that will do it