Baseball Stars (NES)

Super Team
Select the "Make Team" option from the main menu. Then, press Down, Right, Left, Down, Down, Right. Doesn't matter what team strength you are select after that, so just let it be at the "?" option by default. Press A to enter the team name edit screen. A team name "WHEN ISNT IT?" will be displayed. Change it to "WHEN IT IS." including punctuation, then select "END". Now, enter a real team name and complete the team making procedure. The team will have a lot more power than any other teams.

Women's Team
Select the "Make Team" option from the main menu. Now, move the cursor to the "Veterans" strength option, then select any other option. Repeat selecting and deselecting "Veterans" three more times, so this should be a 4 times in total you've selected this option. You can now select anything other than "Veterans" strength to your new team, just don't select the "Veterans" option anymore. Press A to enter the team name edit screen. A team name "WHAT IS A WREN?" will be displayed. Change it to "A BIRD." including punctuation, then select "END" and now enter a real team name. Complete the team making procedure. Now, the team consists of women instead of men.

Super Women's Team
Combining the two cheats above will give you the Super Women's team. First, you need to enter the Super team cheat sequence. Note that while you doing this, you need to have selected the "Veterans" team once already. When done, do the same procedure as in the second cheat of selecting deselecting the "Veterans" option 3 more times. Press A to enter the team name edit screen. First, you'll be asked "WHAT IS A WREN?", write the correct answer, and select "END". Then, you'll be asked "WHEN ISNT IT?", write the correct answer again, and select "END". You'll be finally asked about the real team name. When you complete the team making, you'll obtain a women's team with maxed out parameters.

Japan Version Cheats
The cheats are the same, but questions and answers rather different. Instead of "WHAT IS A WREN?", the question is "おののこまちの　しものくは" ("Ono no Komachi verse is"), and answer now is "わがみよにふる　ながめせしまに" ("As my good looks wither, I worry about love and the world.") instead of "A BIRD.". Instead of "WHEN ISNT IT?", the question is "すとくいんの　しものくは" ("Empress Sutoku's verse is"), and answer is "われてもすえに　あわむとぞおもふ" ("Even though we are parted, I believe we will meet again someday.") instead of "WHEN IT IS.".