Easy money:
Buy Score Attack 3 in a shop, then go to arrange mode A and select Score Attack 3.
Choose the Mosquito 02 (the blue jet) because it is much faster then Mosquito 01.
You will die in the game will have unlimited lives.
No matter what happens, keep pressing R and collect as much money as possible.
At the end, return to the shop and check how much money was collected.
If not enough, play it again until you get enough.

Try to buy the Speed Option and Score Attack 4 in the shop.
Then make it fast for your jet, by going to Special Option.
Go to Score Attack and choose "Arrange" mode.
Then select Mosquito 02 (the blue jet) so you can move fast.
Kill everything in sight pressing or holding R to get even more money.
Do not worry about dying because you will have unlimited lives while playing.

Buy Score Challenge Stage 3 and then play it under Elite Mode A.
Go though the level, collecting as much money as you can.
Only use your Piercing Cannon (press R) because you get more money.
Do not worry about dying, because you have unlimited lives.
When you get to the Boss, position yourself over his center and use your Piercing Cannon.
The gold will come pouring out.

GameShark-Codes
----------------

Den zuerst  9C5D88F8

Infinite Credits  A9FDE25700000009

Infinite Lives  D6CA992B00000009

P1 Invisible  893C6AB60000FFFF

P2 Invisible  35BEBF9A0000FFFF

Unlock Everything  3B0C3FAEE0703041
                   9721AE1E

Tons of Money  7391A146E070D041
               E14F6F60

Max Total Score  58F775CCE070D041
                 E14F6F60

Quick Level Gain P1  7C12945905F5E0FF

Quick Level Gain P2  396F0AB105F5E0FF

Den zuletzt  245EECA9