In catch em mode, when the ball saver is lit (it always is for the first half of catch em mode), drop the ball. This will cause the pokemon to get hit twice (it goes down, hits it, then bounces off the bumper and hits it again). This only works AFTER you hit the chinchou\shroomish bumpers three times, and only in the sapphire field.
On the Pokedex OR High Score screen, hold ''L'' on the control pad, and tap the ''L'' and ''R'' shoulder buttons AT THE SAME TIME - you will receive a prompt confirming whether or not you want to erase your saved data.
Do travel mode 6 times to go to the Ruins area where you can catch Beldum, Rejirock, Rejice and Rejisteel.
Do the following codes to go to the corresponding bonus stages.
When you have 3 Chinchous going in a clockwise circle, shoot the ball up at them. If you did it right, you should go past the Chinchous. If this doesn't work, try again until you get it abouve the Chinchous. When it falls down again, it should hit a Chinchou and fly up again. It should repeat this until you tilt the machine to make the ball get out of this endless loop.