Easy homeruns:
When you can get bat graphics, select the flame bat. Try to get your power ratings to the maximum. You will automatically hit home runs.

Big heat strike out points:
When you and your opponent have their point bars filled, wait until your opponent activates Power Blast and use Strike the Batter Out with Big Heat. You will get 100,000 points for a Big Strike Out after doing it a few times.

Higher rookie stats:
To create a rookie with higher than normal stats, name him "HOT DOG".