Alternate costumes:

Highlight Jigglypuff or Pikachu and press C-Left, C-Right, C-Up, or C-Down to add a hat.

Fight as Jigglypuff (Purin):
Complete the game using any character under any difficulty level and number of lives. Then, defeat Purin.

Hint: Extra boost:
When you use the powerful Up + B attack most characters will do an attack that will give them another extra boost. This is most effective after a jump and a double jump. Here is what happens.

Pikachu: Press Up+B to do Agility. If you press Left or Right immediately after that, you will move twice.

Jigglypuff: Pressing Up + B does not do anything. However, if you jump, punch, float, punch, and continue in that pattern you can go very far distances (but not much in height).

Hint: Pokemon message:
Start a match in the Silph Co. stage. Allow your character to get hit by the Pokeball billboard. Quickly pause game play and move the screen so you can read the pole that holds up the billboard. The message "gotta catch 'em all" written sideways can be seen.

Hint: Jigglypuff: Combos:
When playing as Jigglypuff, press Up + B to put your opponent to sleep. Then, get very close to your opponent, and press Down + B to put yourself to sleep. Your opponent will go flying, and Jigglypuff will remain asleep.

Use Jigglypuff and weaken the target opponent to at least 50%. Then, walk up next to your opponent and use the B + Down attack. This should make Jigglypuff fall asleep and send your opponent flying. Keep in mind that you have to be directly behind you enemy, as if you are trying to run pass him. This should sound like you just did a power attack with the homerun bat.

Press Up + A, then as your opponent is descending press Up + A to hit him again. Stay under him and repeat until he is defeated.

Jump in the air, then press Down + A to spin attack your opponent. When they hit the ground, press Down + B move to send them spiraling into the air.

Press Down + A to do an aerial attack. When your opponent hits the ground, quickly press Up + A. This should send your opponent in to the sky (if at 50%). Another way is to do a Down + A aerial attack, then when your opponent hits the ground, quickly press Down + B if you are touching your opponent.

Hint: Jigglypuff: Suicidal:
Note: This trick requires a lot of patience. Start a vs. mode game with 99 stock with you vs. the a CPU-controlled Jigglypuff. Fight in the Mushroom Kingdom secret stage. Use a lot of weapons during the match. When Jigglypuff's life is down to near 20, she will begin to kill herself by walking straight off the stage. She will do this about five to ten times -- it is interesting to watch because after she walks off a few times she will begin to break her own shield by holding it in very long. Let her to do so and she will damage and stun herself, allowing you to take advantage.

Hint: Jigglypuff: Defeating him:
Use the following trick to kill for Jigglypuff easily. When Jigglypuff blocks, use a super hit on him and it be a K.O.

Hint: Jigglypuff: Go long distances:
Use a jump then a punch (Up, B) repeatedly to travel far.

Hint: Jigglypuff with large arm:
Press Start to pause game play just when you punch. If timed correctly, Jigglypuff's right arm will appear several times its normal size.

Hint: Jigglypuff is upside down:
Select Jigglypuff as your character and any other character as your enemy. This works best in two player mode. Use your backwards toss on your opponent and immediately press Start to pause game play. It will appear that Jigglypuff is upside down.

Hint: Jigglypuff doing a ballerina dance:
Select versus mode and choose Jigglypuff as your character with any other players. When you begin the match, toss an opponent then pause game play. If done correctly, it will appear as though Jigglypuff is doing a ballerina dance.

Hint: Jigglypuff: Hear opponent snore:
Do the sleep attack, then pause game play to hear your opponent snore.

Hint: Pikachu: Jump higher:
After having only one platform left with Pikachu, use his quick attack jump to get higher. Then before it is done, quickly press Analog-stick Left to get below the last platform.
Information in this section was contributed by Peter Natale.

Hint: Pikachu: Fifth jump:
When you have been hurt and are pushed off screen, move in the direction of the jump. When you are ready, press Jump, wait, then jump. Then do his spinning attack a couple of times until you get close to the edge of the stage. Next do his third jump, and hold the Analog-stick diagonally in the direction of the jump. If done correctly, Pikachu will do two third jumps instead of one. Note: This may be very hard to accomplish at first but can be very useful when done correctly.

Hint: Pikachu: Easy battle at Yoshi's stage:
Keep using Thunder constantly.

Hint: Pikachu: Appear flat:
Use PK agility (fifth jump), and pause game play while Pikachu is in the air. If timed correctly, Pikachu will appear flat.

Hint: Defeating Pikachu:
An easy way to defeat Pikachu in one player mode is to just keep jumping around the right-hand side. Eventually Pikachu will use Quick Attack and jump off the edge.

Hint: Easy knockouts in multi-player mode:
The following moves require 200% Damage (set in the multi-player options). Useful items include: Hammer, Pokeball, Beam Sword, and anything you can throw that will result in heavy damage. Here are variations of characters to use and how to get easy knockouts:

Jigglypuff: Her forward and backward throw can work wonders.

Pikachu: If you can get close enough, his Thunder (Down + B) is devastating; or just keep doing it when the opponent is in the air above you.

On multi-player mode, enter team battle and have Pikachu and Donkey Kong on the same team as human players. Use Donkey Kong's throw move, but instead of throwing your opponent hold onto him/her. Then, get Pikachu to use Thunder (Down + B). This will cause quite a lot of damage to the opponent without them being able to do anything. Do this repeatedly for an easy win.

Hint: Mew in Pokeballs:
Unlock at least one secret characters to have Mew appear randomly in the Pokeballs.

To have Mew appear more frequently, unlock at least one of the secret characters, play versus mode, and use the item switch. Switch to only Pokeballs and play in the Sector Z stage. Note: Mew or Clefairy doing Mew's attack does not cause any damage.

Hint: Flying Chancy:
Play on the Sliph Co, stage and get a hammer . When the door opens and Chancy appears, hit to send it flying out the door.

Hint: Pokemon in the Pokeballs:
The Pokemon in the Pokeballs have the following powers.

Beedrill
Flies off to get the rest of its hive to attack the opponent.

Blastoise
Blasts opponent with water spray.

Chansey
Pops out and give you an item. In a second appearance, it just throws Chansey eggs.

Charizard
Starts to breath fire in each direction.

Clefable
Arrives and mimics one of the other available Pokemon's attacks.

Goldeen
Flops around trying to hurt opponent.

Hitmonlee
Comes out and flies at the opponent doing a kick attack.

Koffing
Arrives and starts blasting foul smoke in the air.

Meowth
Pops out and showers out coins that hurt opponent.

Mew
The special secret 151st Pokemon makes his appearance... and flies away.

Onix
Shows up, flies up top, and then boulders drop from the ceiling.

Snorlax
Pops out, flies up, and then comes down huge, hurting your opponent.

Starmie
Finds opponent and blasts them with rays.

Charmander
Just blows fire in one direction (only in Silph Co. stage).

Venusaur
Razor Leaf attack; leaves from this Pokemon fly at opponents (only in Silph Co. stage).

Porygon
Rams you or the opponent (only in Silph Co. stage).

Hint: Ultimate Pokemon battle:
Unlocked the "Item Switch" option. Go to it and set "Appearance" to "Very High" and turn everything off except "Poke ball". Start a battle with two to four players. Select any of the characters and infinite time. Select a level and start game play.

Hint: Keeping your opponent off the platforms:
Use the following moves when playing as the indicated character to knock your opponent off the platforms.

Pikachu
Jump and press B to shoot a little ball of electricity. If it hits a returning opponent, they will be paralyzed.

Jigglypuff
Press B to use the lunging punch when a returning opponent is close enough.

Hint: Regain energy in Silph Co. stage:
Touch Chansey when it appears to regain a small amount of energy.

Hint: Easy Pacifist score:
The easiest ways to get the Pacifist score (60,000 points) are as follows. Note: You must not hit anyone to receive the bonus (through items, bombs, or anything else).

Pikachu's level: Go to the helicopter pad and wait until Pikachu uses Agility and falls off.