You can't. It is impossible
You can only buy backgrounds on New Super Mario Bros. (DS)
By getting every single Star coin
Yes! I would have to say so. Every since Mario found Yoshi, they have been friends.
No, you can only keep him on the levels that has him. If you finish the level on/with Yoshi, he'll wave bye while you go in the castle, but if you know a certain glitch you can start out every lvl with yoshi.
pikachu, bowser, ness, jigglypuff, kirby, mario, yoshi, luig,i dk, fox, samus, and link
You have to collect all 3 Koopa Coins in every level of that world.
It is a picture of an old school Mario game and can be unlocked by buying every Toad House.
every time you complete a dark castle or spend 5 starcoins to get a mushroom you can save the game.
Well if u get out 8 times a ! Mark comes up jump and see wat happens
Star coins are collectables found in every level you will notice they are much larger then other coins and have a star on them.
I am sorry. The answer changes every time a new super Mario is made.
you can't, only some: marth,mario,yoshi,peach,zelda,link,ganondorf,captain falcon,luigi,kirby,pikachu, and a couple more.