Faster packages
Instead of waiting for packages to arrive or for the next day, change the internal clock on your Gamecube to the time that you want in the game.
Golbat Nice card
To get the Golbat card, you must have discovered the Ruins Of Raph and have obtained the Pichu Bros. Episode 5. The next day, go back into that cave in Ruins Of Raph. Go through the same process as you did to get the Pichu Bros. Episode 5. When you are at the question, it will be different than before. Answer it correctly and the Golbat statue will appear. Check in it, and you will find the Golbat Nice card.
Kecleon Nice card
To get the Kecleon Nice card, go to Mt. Snowfall in the evening or at night. You should see a Kecleon there, depending on the weather. Talk to him, and he will want Fan Mail. Go back to the house and Pikachu will make the card. Go back to Kecleon and give him the mail. He will give you a Kecleon Nice card. If you talk to him again sometime, he will look confused and say "Kecleon".
Free Nice cards
To get free nice cards, just go outside and chat with another Pokemon. They will ask you a question. If you answer correctly, they will give you a Free Nice card. The Nice cards are the Pokemon who asked you the question. For example, if you answered a question correctly from a Mr. Mime, you will get a Mr. Mime card.
Easy money
You can get quick money by watching Quiz Wobbefet. Wait for the Present Quiz, then answer quickly and correctly to get 50 to 200 P.
Skip sections on Quiz Wobbofet and Shop 'n Squirtle
On Shop 'n Squirtle, press [R] then [L] to skip sections. The order is as follows.
Intro
L R
First Item
L R
Secound item
L R
Third item
L R
"How did you like our show?"
L R
Intro again
L R
etc.
When you do this, wait until the screen turns black after the channel scroller, then press [R], [L]. On Quiz Wobbefet, the order is as follows.
Intro
L R
Contestants
L R
question 1
L R
question 2
L R
Question 3
Present quiz
L R
Question 4
L R
Question 5
L R
Question 6
present quiz
L R
Ending
L R
Intro
L R
etc.