Press L + R + Start + Select during game play.

You can get four new babies to ride on yoshi.

Note: Baby Wario and Baby Bowser will not remain with you forever, but peach and dk will.

Successfully complete the game, then load your cleared saved game file. The question mark that previously appeared un the lower right corner will be replaced with the "Time Trial" option. There are five extra levels (one from each World) in Time Trial mode that are playable with a black Yoshi.

Get 100 points on each of the eight stages (except the secret stages) in a World for a total of 800 points. To do this, you must collect 20 red coins, 5 flowers, and 30 stars.

You can swallow the rotating arrow in any stage it appears in.

In any level where there is is a big spiky wheel that you run from and a moving platfom (any direction) this will work. When the wheel first starts chasing you you have to run. Once you find the moving platform stand on it. Let the wheel hit you and go off the screen then go get your baby. After you get your baby go back to the moving platform. When you go forwards all of the platforms will still be there. Jump across. This time no wheel will be chasing you. I recomend at least 10 seconds on your baby timer. This will only work if there is a moving platform.

Make Yoshi do the flutter jump. Just when he is doing the flutter jump, press X (or R button if you switched the controls) to make Yoshi aim his eggs. Notice that his feet stay still when they are actually meant to kick around while he is flutter jumping.