The green cap is in the hidden area of the Hazy Maze Cave. Not sure if thats the correct level name, but it is the level in the basement where you jump into a pool of murky water.
There's a hidden room, down where you find Nessie the Lochness Monsta! Ride on her back until you see the double doors in the way back...once you go through, there will be a liquid pool inside...jump in....and BAM! METAL MARIO MODE! One star *collect 8 red coins* and Hit the green switch! Yahoooo!!!
thanks. it took forever though. the hardest one was the last level, (the rainbow one i think) where you had to get 100 coins. sheet man that was hard. i got very frustrated.
Wow, it's just too much puzzle game for me. I like the games where you have to fight a boss a billion times and figure out it's weaknesses and stuff. If mario and a sword and a cure spell.....it *could* be easier for me...maybe
have any of you ever gottan that cannon and broken through the glass pic of peach into a glitchy room ? its realy kool > > > ooo and yoshi on top of the castle > > so kool wow this game is so kool i forgot about it