Guess what? When the cannons fire cannonballs at you, you can eat the cannonballs!

After you have gone over all the hills there is a pipe that ‘Shy Guys’ come out of. Ignore them and go past the pipe and get rid of the Killer Plants in the next two pipes to the right (one above and on the ground). A Kooper is walking between the two pipes on the ground. Jump on the Kooper and send his shell spinning between the two pipes. ‘Shy Guys’ continue to jump out of the pipe on the left and every time the Kooper shell hits them you will hear a different sound that means you’re getting lives! Stand on the pipe on the right and the lives will continue for as long as you stay on this screen.
I have tested the method and it really does work. this is really going to help me on bosses and world 6.
while the shell hits them you see the one up happen over and over.

In the game there is a coin with one of the baby's faces on it in each level and if you manage to find all of the coins in each world you unlock the harder version of a minigame in the minigames menu!
Bouncy Maze (Hard) - Get all character coins in World 3
Egg Toss (Hard) - Get all character coins in World 5
Flutter Challenge (Hard) - Get all character coins in World 2
Speed Eating (Hard) - Get all character coins in World 4
Tulip Shooter (Hard) - Get all character coins in World 1

Have you seen a rotating arrow? Well, did you know you can EAT it? It will reappear! It doesn't do anything, but strange that you can eat it.

If you get a 100 points on all levels in a world, you unlock a bonus level. This level will allow you to get extra items and level ups!

Do a flutter jump will with some eggs. Press X to aim your egg, but Yoshi's feet will stay still! They should be moving, shoudn't they? He can't flutter without moving them... hmmm?

when in a underground or poorly lit area their should be a lamp on the wall. if you eat it (y) yoshi will have 3 blasts of flame breath!

Get 700+ points on any world to get a bonus game. There are 5 to get.

Time Attack: Beat the game.
1st secret level on every world: Beat the game.
2nd secret level on every world: Get 800+ points on that world.

To restart your game, what i mean is to restart the level thing, press R, L, START, and SELECT at the same time.

If you beat the game, you unlock 'Time Trail' mode, and there is 5 levels to play, one from each world. You will play with black yoshi!

First get DK. Sallow a enemy, then go up a vine. You should 'look' like you have a enemy, but you don't! Climb down and you won't have a enemy in your mouth!

At the end of each level there is a ring that can have 0 to 5 flowers on it depending on how many flowers you found in the level. When you jump in this ring there will be an imaginary ball that circles around the ring and if it stopped on a flower you would get warped to a bonus stage. There is another way to get one of these 5 bonus levels however and here's how...
Flip Cards - Get a total of 700 points in World 1
Match Cards - Get a total of 700 points in World 3
Roulette - Get a total of 700 points in World 4
Scratch and Match - Get a total of 700 points in World 2
Slot Machine - Get a total of 700 points in World 5

Once you've beaten the game, you will be rewarded the Time Trial mode. To access Time Trial enter the File Menu like you would starting up a game. Your completed game file will have a star icon and will have the word 'Clear!' under where the world should be. Click on your file and you will notice 'Time Trial' on the bottom right corner where a question mark used to be. In Time Trial mode, you will be rewarded 5 extra levels, one for each world. You will also be able to play those levels with a black Yoshi.

if you needed a certain enemy to jump on but you killed it, go backwards and swallow an enemy but dont turn it into an egg. if you push b+ up you can spit it out without killing it.

As a precaution, I find it very useful to try to get the timer of how long little Mario can remain in the air. Sometimes you have to jump or cross something that takes a bit. With a high clock timer, you'll have time to get to baby Mario.

Go in a place that there is a roof on top of Yoshi and shoot an egg at it. The egg will ricochet and bounce back to Yoshi very fast. Too fast! So as soon as you fire the egg sick with your mouth and you will have a colored egg!

When you come to one of those red tulip-things that gives out stars, before you get your stars, try this: Aim an egg at the ground at an angle so that it will bouce off and hit the bottom of the flower. It will turn orange when it hits the ground and when it hits the flower it will fall to the ground. Now you have an orange egg. If you do it twice you get a red egg which gives you stars when you hit something.

If you get 1000 points in 5 worlds you can play hard mode.

if you play melee you'll notice yoshi's second jump is extremely high
to do that in the game jump on an enemy , and if you dont hit the ground you're jump will be much higher. I used this to beat a few levels easier.

Every see that when you reach the end of the level, the game is always reached at the flower space? Well, those flower spaces don't appear in random numbers. You have to get them.
Now, you may be thinking, how do I get this space? Simple! During one of my playings of this game, I saw that when I got a certain number of flowers in the game, those flowers turned into the flower spaces, which made it easier to get the game.
So if you want to get the game without hoping it will land on that ONE flower space, hope no longer! All you have to do is try to get all the five flowers and you will have a better chance at those games!

you can ride lakitu's cloud for a short while, then it will disappear
there are two ways to get his cloud
1. eat lakitu, DONT eat the cloud it will go away if you do
2. * preferred way * jump on lakitu, the cloud will stay there and you can fly around on it.
use the control pad to control it, it will disappear after about 10- 15 seconds, or if it hits an object or enemy

in level 1-7 it is very hard to get all 20 red coins. when you get to the red/yellow bridges get all the coins but don't finish go to the raised log and jump as high as you can, a jump shere will appear, jump on it and you'll go through a pipe. move the chomp rock and a winged cloud will appear, it has a beanstalk in it. climb it to get the final 4 red coins.

on the level selection screen hold select and press l,l,b,a,r and you'll unlock the mini battles with the bandit. you can get free items buy doing this

if you do a ground pound when a egg-shooting plant is on the screen, eggs will shoot out, so that if you get them all you will have six eggs.

Get up to the part when you are in world 4, level one. Get up to the part when Shy guys are jumping out of a pipe. Get a Koopa shell, then stand on the hill, in front of the 2 red things that open a nd close their mouths. Make sure you have no eggs, then throw the koopa shell down. If you are standing right, the koopa sheel will come back, and go under a bit of yoshi's feet, making it jump a little. Don't worry. After a while, Shy Guys will jump out and will be killed by the shell. Now, listen to the sound, and it will get higher and higher (don't move). Just wait for about 2 mins, and 1 ups will appear. The most number of lives you can get is 999. We tried to get 1000, but failed. We know.

On Yoshi's island level 1-8 (the castle),get to the end and start to defeat Salvo. Stay off to the right near the lava.When you hit him the last time, he'll freeze. Very quickly jump into the lava. You won't die but Yoshi will be gone and you won't get to see the key.

If you manage to total your world points to 777 exactly, you are rewarded with a 7UP.

When you are on the level select screen hold Select and press L,L,B,A,R and you should unlock a new screen full of bouns games.

If you attain more than 700 points in a world, the Extra Challenge stage will be unlocked. This is essentially one of the challenges you can find at the end of levels.

Get 800 points in each world to unlock the Extra level in that world.

In World 1-7 take a rolly polly and hold it in youre mouth until you get to a green pipe that spits out shy guys. Spit out the rolly polly and jump out of the way and as the shy guys spit out of the pipe it will give you points and eventually 1up after 1up.(It can be time consuming have some fresh batteries.)

To access the mini-games without entering stages, hold SELECT and press L, L, B, A and then R, at the level select screen.
You should be presented with the mini-games menu, which allows you to play all of the mini-games available in the game and earn the prizes from them.

Complete the game once through to open up six 'Secret' levels, one for each world.

Go to 1-7, now when you are nearing the end, at the red and yellow bridges, ground pound one. Now pause it and watch Yoshi go through the ground. Yoshi will die.