New Super Mario Bros. Tips

Beating The Two Final Bosses
You can not beat the final boss,Bowser, without first obtaining a Mega Mushroom,after obtaining a Mega Mushroom,make it through the final level and drop the Mega Mushroom once at the bridge, then simply walk across and knock Bowser Jr. out. Then jump to the button and enjoy the game's ending. You can also knock out Bowser Jr. in the fortress stages as well with a Mega Mushroom!

[Mod Edit] You don't have to aquire the Mega Mushroom in order to beat Bowser.