Paper Mario [N64]
Go to the alley right next to Toad's house in Dry Dry Outpost. Jump forward over the left box and the camera will swing around to reveal a hidden area. Talk to Merlee to learn about her special spells. Depending on how much money you spend, she will help you during and after battles. The spells do wear off after a certain amount of time, but until then, it provides you with additional attack power during some battles and more coins after battles.
Go south in Toad Town until you get to the area with the Li'l Oink Farm. Go left immediately after you enter this area (there is a narrow passageway that's not fenced off). Hit the tree with your hammer and a pipe will appear on the right. You can now enter the playroom, but need either a Silver and/or Gold card to play the games.
Classic Mario music
Go to the third house in Koopa Village (a Koopa is sunning himself inside). Stand in front of the radio and press A to switch between stations. Listen to the Golden Oldies station to hear classic Mario theme music.
Go to Boo's Haunted Mansion and enter it. Once you get in the door continue walking straight until you come to a wall. Walk to the right until you see a door. This is the door farthest to the right. Walk into where the door leads you. There should be a large pot and a crate to the left. Jump on the crate and jump into the pot from there. When you jump out, you will be the original NES version of Mario. Note: You cannot leave the room with this trick on.
Luigi's secret diary
Once you have the Super Boots and/or the Ultra Boots, go into Mario and Luigi's bedroom in Mario's house. You will see a square of boards facing the wrong direction. Do a special jump (press A while in the air) to go into the basement. Look at the book on the table to find Luigi's diary.
Answers to the Bowser questions
The answers are as follows: "3", "Red", "Red", "24".
Never-ending hallway pattern
The pattern to the "Never-ending hallway" is up, down, up, down, down, up.
Ultra-Level party members
Once you visit Raphael the Raven, you can "Ultra-Level" your party members. The best one to "Ultra-Level" is Parakarry, because he learns "Air Raid," which uses 6 (or 8) FP, and deals about 6 damage to each enemy (if you get to 100% on the "Press Left repeatedly" meter).
How to beat Tutankoopa:
Buy 9 thounderbolts and use them all on Tunankoopa. Then use Parakarry's Shell Shot.
Get the Hammer Throw Badge:
Right before you go in the hall to Toad Town, look at the tree above. It should have a spring (jump). Hit the tree with the hammer. The jump will fall and you will get the Hammer Throw Badge that lets you hit anybody in battle with your hammer.
How to beat the Dojo Master in one shot:
Go to Mario's house and spin into the next scene, and beat every other Goomba you find, ending up in Toad Town, go to the Post Office and read a letter ten times, and go to the dojo, and the Master will glow a neon red, he will be extremely weak
Infante Goomba Nuts:
Go to Goomba Village and hit the tree beside the fence. You will get a goomba nut. You can do this infante times. Just leave and go back in.
If you have taken damage just jump in some water that you can be submerged in and rise to the surface then you will have your enegy filled up.
Fat penguin race
After getting 120 stars, go to race the pengiun in the 3rd world (The snow one) and he'll be fat, harder to beat, and have a new message for you.