checked-part =>Alternate 3-8 Boss Battle: It is possible to kill Naval Pirahna, the level 3-8, with a single egg. Play through 3-8 until you reach the boss door. Enter the door and swim right. When you see a platform in the air, jump on the left edge of it and do not move further right. A shrunken pirahna plant should be on the right edge of the platform. Shoot the plant with an egg and you'll kill the boss before Kamek has a chance to enlarge it; in fact, Kamek will appear and comment on your kill. =>Minigame Menu: On the level selection screen of any world, hold [SELECT] and press [L] [L] B A [R]. You will get a new menu with all the minigames. =>Extra Levels: Get 100 points in each of the 8 levels in a world to open up the Extra level for that world. =>Secret Levels: Once you beat the game, you will open up six secret levels. There will be one in each world of the game. These levels weren't found in the SNES version of the game, but are entirely new. =>Minigames: If you earn at least 700 points in a world, a minigame will be opened up on that world's stage select map. The minigame will be one of the games you normally play when getting a flower in the roulette at the end of a level, but you can replay this minigame as often as you want. ->Extra Ending/Hard Mode: If you manage to earn 100 points in every level of a world (1000 points), a star will appear on the title screen. If you can gather all six stars (one for each world), you will get a special ending and be able to play the game's Hard Mode. =>999 Lives: Begin Stage 4-1 and travel until you reach the two long pipes hanging upside down. Kill off the Piranha Plants, then swallow Shy Guys until you have 6 eggs. Grab a Koopa Troopa, stand on the pipe which previously held the lower Piranha Plant, and then spit out the shell between the two lower pipes. As it bounces back and forth, rid yourself of an egg; Shy Guys will begin pouring out of the other pipe and will be bowled over until they begin yielding extra lives. =>999 Lives Method 2: In Stage 1-7, lap up one of the rolling guys, but don't swallow him. Progress right (don't break the dirt blocks!) until you come to a small pipe spitting out Shy Guys. Stand to the right of the pipe and spit the rolling guy out so that he lands to the left of the pipe, then move Yoshi onto the wooden ledge just to the left of the pipe. The rolling guy will roll into a ball and hop up and down, but he won't be able to hit you. Meanwhile, the Shy Guys will pop out of the pipe, walk left, and be killed by the hopping ball guy. After killing about 8 guys, every additional Shy Guy killed awards you with a 1-up. =>World 1-7 Bonus: Stand on the last log at the end of the stage and jump up to knock down a spring ball which will propel you into a bonus area with 4 red coins.