Shy Guy These are the "Goombas" of the game. All they do is walk. They are vulnerable to virtually any kind of attack. Like Koopas, red ones will walk off of platforms and even follow you, but blue ones stay put on platforms. Shy Guys later become the main enemy of Yoshi games, and is even playable in Mario Tennis!
No image available	Snifit Snifits look like gray Shy Guys, but are different. Like Shy Guys, they also come in a variety of colors. Gray ones don't walk, but fire bullets constantly. Red ones walk off platforms, and follow you, while blue ones stay put on a platform. Red and blue ones very rarely fire shots. Snifits are characters in Super Mario RPG, and also appear in Mario Party 3.
No image available	Beezo These are like flying Shy Guys with pointy forks. They swoop down to your level, then chase after you. Very annoying. You can ride them, but doing so requires you keep moving or else you'll slide off. Bad idea. Beezo is an enemy in Super Mario RPG.
	Flurry These pinkish snowmen won't stop until they've tracked you down! They will continue chasing you. They slide around, which can increase their speed by may make them slide to their unfortunate doom (pit). They can be defeated like any enemy.
	Pidgit Pidgit owns a magic carpet. He'll swoop down and try to hit you. When he does, hop onto his back and throw him off the carpet. Now the carpet is ours. Simply move the Control Pad and you'll move the carpet. When it begins to flash, it will disappear short after so jump off! Pidgit made an appearance in Super Smash Bros. Melee as an enemy in the Mushroom Kingdom II stage and a trophy to collect.
	Spark Very, VERY annoying. These sparks (hence the name) move around platforms and objects. Touching them is a bad idea. Defeat them any other way. Use a POW Block for a quick victory, since they are always stuck to a surface. I believe I saw Spark in Super Mario World, and I remember him from Yoshi's Island. A Spark-like character (ally) appeared in Paper Mario.
No image available	Phanto Phanto won't harm you unless you steal the key. He'll chase you until you drop the key, but he'll start again as soon as you pick it back up. He'll also disappear if you enter a locked door with the key. Phanto can only be defeated with a Star.
	Panser Panser is a flower that spits fireballs around. It can't be picked up, so throw an enemy or item at it. Some Pansers actually walk (the blue ones), which can be a huge pain.
	Hoopster They climb trees, chains, vines, etc. They can be defeated virtually any way possible, like most enemies.
No image available	Bob-omb Bob-ombs are very annoying. Albatoss like to throw them onto you, which is very annoying. They chase you down until they explode. You can pick them up, but they may explode on you. Sometimes, you may accidentally dig one up. Throw it immediately! It's already about to explode! Bob-ombs quickly made a reappearance in Super Mario Bros. 3, and soon became a very common Mario character. He's even an item in the SSB series (a very dangerous one at that).
	Trouter These are like piranha fish. They hop out of waterfalls, then go back down. Sometimes, you must use them as stepping stones in order to get over waterfall pits. You can pick them up, but you'll probably fall to your doom after losing your little stepping stone.
	Ninji These black star-like things do nothing but hop up and down. Up and down, up and down. Some will run after you, and hop to confuse you. They are basically hopping Shy Guys; they are weak to anything. They make a return in Super Mario World, for a brief moment at the very end of Bowser's Castle.
	Porcupo These are purple hedgehogs. Unlike almost any enemy on the game, you cannot pick them up because of their sharp quills. Defeat them any other way but that. Porcupo was an enemy in Yoshi's Island.
	Albatoss Albatoss are big birds that drop Bob-ombs on you. They can be defeated (with a Star only), and you can ride them. Unlike Beezo, you don't have to move to ride them making them perfect for shortcuts.
	Tweeter Tweeters are little masked birds that walk around and hop. They are basically hopping Shy Guys. You can ride them, like Shy Guys, to get over spikes. Tweeters appear in Nimbus Land on Super Mario RPG as soldiers for the castle.
No image available	Colbrat Cobrats are big red snakes. They hide in quicksand and jars. You can usually see their beady eyes peering out. Be careful; some spit out bullets! If you throw them, they'll disappear from the screen.
No image available	Pokey Pokeys are moving cacti, made up of four balls. You can pick up its head, but then the next ball becomes its head until nothing is left. For a quick Heart, pick up its head and hit the bottom ball to defeat the entire enemy. Pokeys can move right through any objects, even walls! Pokeys made a reappearance in an early stage of Super Mario World, and I spotted them in Super Mario 64 again. They are also in Paper Mario.
No image available	Autobomb These are cannons on wheels, with a Shy Guy riding. When the Shy Guy is riding, it will fire fireballs at you, so watch out! Throw the Shy Guy off and you can ride the Autobomb over spikes and such. I wish I knew what the "M" stood for.
	Ostro Ostro is a pink flaminco that usually lets Shy Guys ride them. Pick up the Shy Guy and defeat the Ostro with it; the Ostro gives you a Heart no matter how you defeat it. These things aren't much of a threat.
	Birdo Birdo is the boss of almost every stage, coming in a variety of colors to increase difficulty. The pink ones fire normal eggs, slowly. Red ones fire a combination of fireballs and eggs, while green ones fire only fireballs. (?) Anyway, the traditional one of defeating one is to jump atop the egg she spits, pick it up, and toss it back at her. Sometimes, there are no eggs for use. So, try the Mushroom Blocks that are usually around her. Birdo makes a lot of appearances in future Mario games. However, I can only think of two. She appears in Wario's Woods and is even playable in Mario Tennis!
	Mouser You battle Mouser twice throughout the game. His main attack is bombs. He throws bombs. Pick them up before they explode and chuck them back at him!
No image available	Fry Guy This fireball is a hot head. Avoid his fireballs, then smash his hot head with some Mushroom Blocks. When he splits into four miniature fireballs, squash each one with a Mushroom Block. They increase in speed as each one is defeated, so watch out!
	Clawgrip Catch the rocks he tosses at you, then toss them back. I have a much better strategy, but read the walkthrough.
	Tryclyde This three-headed snake spits a ton of fireballs, but his fireballs can't pass through Mushroom Blocks. Make a barrier of Mushroom Blocks, then use the leftovers to bean him with.
	Robirdo A robotic Birdo. More on the walkthrough.
	Wart The last boss hates vegetables. If you throw them into his mouth, he'll definitely have a stomache ache. The mannerless beast will fire snot bubbles at you, so watch out for the poisonous balls!
	Subcon Creatures The newest remake of SMB2 introduces a new set of "creatures." They usually don't hurt you. There's a screenshot of one to the left. They're purposes are pretty much self-explanitory, and they're use isn't required to finish the game. Just a nifty feature.

SOME BETTER STRATEGIES MAY BE FOUND IN THE WALKTHROUGH!