Mario Tennis 64

All characters and courts:
Note: This does not unlock the Mario's Star court, and will delete all your saved accomplishments; it marks all of the goals as completed, including a gold star on all of the Ring Shot challenges. Press Down(2), Left(3), Right(3), C-Down(2), C-Left(3), C-Right(3) when "Press Start" appears at the title screen. A sound will confirm correct code entry.

Nintendo Ring tournament:
Press Start at the title screen. Highlight the letter S (Special Games) in the center of the bottom row and press A. Highlight the trophy (Ring Tournament) icon, which is the third from the left and press A. Enter A3W5KQA3C as a password to play a tournament for the Mario Cup. Another password will be displayed after completing the tournament. The new password is not actually a password for the game, but is for ranking you with other players at Nintendo's Mario Tennis web site. Other passwords include the following.
Information in this section was contributed by Waylon Calhoun and BowserKoopa7000.

Enter J6M9PQJ6U as a password to play for the Nintendo Power Cup.
Enter ARM6JQARU as a password to play for the Blockbuster Cup.
Enter V2UFMPUZM as a password to play for the IGN64 Cup.
Enter V5UFMPU5M as a password to play for the Pokemon.com Cup.
Enter 48HWOR482 as a password to play for the MarioTennis.com Cup.
Enter M1C2YQM1W as a password to play for the Luigi Cup.
Enter LA98JRLAR as a password to play for the Waluigi Cup.
Enter UOUFMPUOM as a password to play for the Wario Cup.
Enter MM55MQMMJ as a password to play for the Donkey Kong Cup.
Enter OF9XFQOFR as a password to play for the Peach Cup.
Enter N24K8QN2P as a password to play for the Bowser Cup.
Enter 4YHWOR4Y2 as a password to play for the Mr. Pickle's Cup.
Enter ZKZLZKNNR as a password to play for the Yoshi Cup.
Enter 5G3LTQ5GN as a password to play for the WimbleDonkey Kong Cup.

Left-handed character:
Hold L while selecting a character to make him/her left-handed.
Information in this section was contributed by bear654.

Star player/handicaps:
Note: Win the Star Cup with a character (get three cups in a tournament). Hold R while selecting that same character to make him have handicaps and make him more powerful. A yellow star will appear in the bottom right of the screen (for player one) or bottom left of the screen (for player two). Press L + R to have a left-handed player that is also a star character. Being a star player will enable you to serve stronger and play better. If you make Bowser a star player he will be able to serve up to 136 mph. Note: Donkey Kong Jr. and Shy Guy are already star players when they are unlocked.
Information in this section was contributed by bear654, KSven006, and NAN643.

Rocket shot:
Press A + B for a rocket shot. This also works when serving. If done correctly, a purple streak will appear after you hit the ball.
Information in this section was contributed by Mcfar4630 NAN643.

Slow shot:
Press B, then A.
Information in this section was contributed by NAN643.

Lob shot:
Press A, then B.
Information in this section was contributed by NAN643.

Control the ball:
This trick can be done with any player, against any player. Hold Analog-stick Left or Analog-stick Right as you hit the ball. This will send it in whichever direction you pushed the stick.
Information in this section was contributed by Wil Vandiver.

Shy Guy:
Win the Star Cup/Singles Tournament. This character can already use the handicap cheat after being unlocked. You do not have to win the Star Cup as this character.
Information in this section was contributed by ksven006 and NAN643.

Donkey Kong Jr.:
Win the Star Cup/Doubles Tournament as any character. This character can already use the handicap cheat after being unlocked. You do not have to win the Star Cup as this character.
Information in this section was contributed by ksven006 and NAN643.

Game Boy Color characters:
Use the Transfer Pak with the Game Boy Color version of Mario Tennis. Select "Transfer" at the main menu, then select "Game Pak Check". After it checks, select the option to transfer the Game Boy Color characters. This will allow you to play as Alex, Harry, Nina and Kate.

Bowser Court:
Complete the Bowser 2 on 1 mini-game on Mario Tennis on the Game Boy Color, then send the data to the Nintendo 64 with a transfer pack.
Information in this section was contributed by JtizzleXperience.

Donkey Kong court:
Win the Mushroom Cup/Singles Tournament as Donkey Kong.

Yoshi and Baby Mario court:
Win the Mushroom Cup/Singles Tournament as Yoshi.

Mario and Luigi court:
Win Mushroom Cup/Singles Tournament as Mario.
Information in this section was contributed by bear654.

Mario Brothers court 2:
Win all the Doubles Tournament Cups as Mario. Note: This is another Mario Brothers Court, but not the alternate way to get the previous one.
Information in this section was contributed by Desmond Choy.

Mario/Luigi Castle court:
Win the Star Cup Doubles and Singles Tournament as Mario.
Information in this section was contributed by bear654.

Super Mario and Wario Courts:
Win the Mario mini-games for Mario and Wario in the Game Boy Color version of the game. Then, refresh data and send it to the Nintendo 64 through a Transfer Pak.
Information in this section was contributed by BLaZedBaLLeR.

Wario Brothers court:
Go through all the cups for Double Tournament with Wario.
Information in this section was contributed by Desmond Choy and bear654.

Waluigi Court:
Win the Medallion Match and set a new high score in challenge mode in the Game Boy Color version of the game. Then, refresh data and send it to the Nintendo 64 through a Transfer Pak.
Information in this section was contributed by Link873714.

Piranha Plant court:
Note: This court only works in Piranha Plant Challenge. Complete any court (perfect, all 50 balls) in the Piranha Plant Challenge with any character.
Information in this section was contributed by Desmond Choy.

Birdo/Yoshi court:
Complete the Star Cup Doubles as Birdo to unlock the Birdo/Yoshi court.
Information in this section was contributed by Pokeyoshzero.

Star tournament:
Have all characters a star player to play in the Star tournament.
Information in this section was contributed by NAN643.

Special Cups:
Go through all the Tournament Cups with all the characters (including Shy Guy and Donkey Kong Jr.) to unlock the Special Cups, which are much harder than the previous one. Press R while selecting a character to access the Special Tournament in the menu.
Information in this section was contributed by Desmond Choy.

The three Special Cups in order are Rainbow Cup, Moonlight Cup, and Planet Cup. Once you win a cup, you will move onto the next one.
Information in this section was contributed by ksven006.

Unlocking skills levels:
Win the Planet Cup with all sixteen players to enable Max Difficulty in exhibition matches.

See the same replay again:
Press B while in a replay and you will see the replay again. This can be done at any point of the replay for as many times as desired.
Information in this section was contributed by Mcfar4630.

Restart replay during demo:
Wait at the title screen until the demo begins. Press B to restart the replay. Any other button will end the demo.
Information in this section was contributed by Clint Emsley.

Hint: Shining eyes during replay:
If you are playing against Waluigi and he makes it past you, during the replay his eyes will shine for awhile.
Information in this section was contributed by HTr3235643.

Hint: Funny sequence:
Win a cup with any character and wait for awhile.
Information in this section was contributed by Steveandjoanne.

Hint: Better chance of winning:
When playing against the CPU, if you win a game or a set (in the final of the cup), save the game, then start again. In case you lose, you can continue the game and start with the advantage.
Information in this section was contributed by gazan818.

When playing against the CPU, press B then A for a slow shot close to the net, then run up to the net. After your opponent hits it, quickly hit the ball away from him. The ball will zoom by him, leaving him no time to react, and giving you an extra point.
Information in this section was contributed by Piccolo60000.

When playing a two player tournament against the CPU, note that when one CPU player goes to one side the other goes to the opposite side, so as not to leave a single open space. Their main formation will look like this:

           X   
                        X
     -------------------------------

Try to get in the front row. Then, go in front of the opponent closest to the net. If the opponents happens to change rows, stay in front of the person closest to the net. Leave a little space between you and the net. Then, when the ball is headed toward you, save up as much power as possible then hit the ball over the opponent that is closest to the net, and right in front of you. If done correctly, the ball will go over one opponent's head and his or her partner will either be too far away to hit it in time or barely hit the ball.
Information in this section was contributed by Threefiddy350.

Hint: Court features:
Information in this section was contributed by felix_rj.

Hard court
Speed: Normal
Bounce: Hard

Clay court
Speed: Slow
Bounce: Weak

Grass court
Speed: Fast
Bounce: Weak

Composition court
Speed: Fastest
Bounce: Normal

Hint: Special graphics:
If you have selected to be a Star Player, you will notice that when you do a charged shot a special graphic will appear around your character briefly. The following is a list of the special graphics that will appear for each of the normal A and B shots, not including the Slice Spin (Purple Shot).
Information in this section was contributed by bern and eeyore990.

Mario: Yellow stars
Luigi: Nothing
Peach: Hearts
Baby Mario: Small yellow stars
Yoshi: Rainbow appears behind racket
Donkey Kong: Blue stars (Charged Slice) or orange stars (Charged Top Spin)
Paratroopa: Feathers
Donkey Kong Jr: Blue and green stars (Charged Slice) or green stars (Charged Top Spin)
Wario: Blue stars (Charged Slice) or orange stars (Charged Top Spin)
Waluigi: Nothing
Daisy: Unknown
Toad: Unknown
Birdo: Nothing
Bowser: Blue Stars (Charged Slice) or orange stars (Charged Top Spin)
Boo: Unknown
Shy Guy: Will have just a red tennis racket

Hint: Missed serve:
Play a game in any doubles game mode. Have a person directly in front of the server on your team. When he/she tosses up the ball, tap A or B a few times. The server should miss the serve most of the time.
Information in this section was contributed by MBink721 and MBakaShorty721.

Hint: Switch court sides:
If you do not like being on the other side of the court, press Start, choose "Camera Options", then "Player Cam". You will now be on the closest side throughout the game.
Information in this section was contributed by mhoward97.

Hint: Face smash:
You can do this trick with any character, but Shyguy is recommended. When your opponent pops the ball up, start charging up and press Away. Just when you are about to hit the ball, press Forward. This will usually hit your opponent in the face.
Information in this section was contributed by Jesse Graddy.

Hint: Easy point in Doubles:
Whenever your partner is serving, get next to the net. Hopefully, your opponent will send a high ball, allowing you to smash it and score.
Information in this section was contributed by Kyrat_Zyon.

Hint: Defeating Bowser:
In the Star Cup Singles Cup, Bowser is the most difficult character to defeat because of the way he serves. He almost always serves on the inside very quickly. Use caution when facing him.
Information in this section was contributed by Koolnez345.