Donkey Kong
Barrel: Jump over these to gain 100 points. Found by Videogamerpat.
Fire Barrel: This is where all the barrels that Donkey Kong throws eventually go, except, of course, when they hit Mario. ^_^ Found by Videogamerpat.
Hammer: Mario gets hyper and can smash obstacles in his path for a while when he pichs this up. It also appears in Super Smash Brothers (not a Mario game). I was reminded about this by Blackbelt.
Key: You can throw this at enemies, use it as a platform, or open a locked door with it. If you pick it up, throw it, and leave it alone too long it goes back to the start. Only appears in the Donkey Kong game for Game Boy, not the Arcade version. Found by Lord Seth.
Ladder: Mario climbs with these, duh! Some may be broken. Found by Antwan.
Peg: Touch these to remove them from the platform. It's what keeps the platforms staedy. Take out all eight and Donkey Kong will receive brain damage. Found by Antwan.
Pie: Collect these to gain 200 points. Found by Videogamerpat.
Pink Purse: Collect these to gain 300 points. Found by Coco.
Scrolling Platform: These platforms scroll up or down on an electrial pulley, and touching the ends will shred Mario to bits like a grinder and meat. Found by Antwan.
Umbrella: Collect these to gain 300 ponits. Found by Coco.
Go back to King Koopa's Item
Chest.
Go back to Lemmy's
Land.