When you buy a power-up for a player, the game randomly assigns 1 to 6 points for you to spend on your player's stats. Baseball Stars constantly auto-saves: if you bought a power-up, got 1 measily point and spent it, you can't reset and load the old save. However, if you reset BEFORE spending the points, you'll still have your money, so you can just reset as soon as you buy the power-up (and find out how many points you got) and try to get 6 points everytime. This saves you a lot of money, especially since the cost of power-ups grows exponantially.
This might damage the cart's battery save, so you probably shouldn't do it unless you're using an emulator (Note: don't bother using emulator savestates for the same effect, you'll keep getting the same amount of points)
Create a team, but don't spend any money on player development. Play League games against the SNK Crushers until you've won about 15-20 of them and have $250-300K.
Fire all the players on that team, then power up until you have 15 Prestige for every player. Put the overage into Luck if you get enough points to exceed 15...pitchers should power up under ''see other abilities''.
Now create another team (your ''real'' team) and keep playing League games against the Prestige guys. You'll make a minimum of $75,000 from the gate for ten minutes or less worth of work.
Select Create Team and then press down, down, down, down, down, right, right, right, right, right, right, right. Select "power hitters" and then change "WHAT IS A WREN?", into "A BIRD." Remember to punctuate the answer.
Select ''Make Team'' from the menu and press the following: