Catch Jirachi in Pinball R/S
To capture Jirachi you must be doing very well, and have caught and evolved a number of Pokèmon. To get Jirachi you have to wait for it to appear on the slots.
Then you have to be lucky enough to actually get the slots to land on it.
Once that happens Jirachi will appear and start floating around the screen.
You then have 30 seconds to capture Jirachi by hitting it three times.
You have your very own Jirachi!