This world is a lot longer than the previous one...and so is this video.
2-1
Avoid the cacti; you can't destroy them. You can, however, stun them briefly if you're angry.
The blue pterodactyls can easily be defeated with an aerial headbutt.
Sometimes you can find hidden bonus areas. The first stone hut you see contains a bonus area where you can collect a lot of bonus points if you stay airborne, and all you need to do to go in there is walk up to the doorway and press Up. Use the aerial spin to move from one yellow plant to another.
The hut to the right of that contains the volcano mini-game. Stand directly in front of the second plant, then alternate between headbutting and jump upwards to hit as many rocks that erupt from the volcano as possible.
If you enter a bonus area while invincible, the invincibility restarts once you're back in the main stage.
The small red triceratops will move back and forth fairly quickly to avoid getting hit.
There is a third bonus area where you jump off a cliff and spin as much as possible. You also want to land on your feet to get some bonus points; landing on your head gives you nothing. You lose. Good day, sir.
Take care on the quicksand, as failing to jump on it on often will cause you to fall on some spikes at the bottom and lose a little bit of health.
Headbutting the trees on the quicksand will allow you to make them move back and forth, acting as a free, safe ride across the quicksand. Both branches as well as the top of the tree act as platforms. Stay on top of the tree here for some smiley faces.
2-2
When the dragonflies stop in front of you, be ready to headbutt them when they advance.
Electric eels will jump in and out of the top of the waterfalls. You can stand on the waterfalls, but much like the quicksand, you will drop to the bottom if you fail to keep jumping. If that happens, though, you can jump up and climb the waterfall much like you can a wall.
Watch out around small plants; tiny Compsognathus dinosaurs will pop out of them and run at you fast.
You'll eventually have to go underwater when you see a huge wall. Here, you'll fight off some eels as well as some slow-moving trilobites that stick to the ground.
2-3
There will be slugs on the floors and ceilings, and there will also be red smiley faces in bubbles that move across floors, walls and ceilings. When the smiley faces come your way, headbutt them. If they run into you, the smiley faces reveal themselves to be eggs and hatch, and you'll have to destroy the little monster that comes out and jumps around after the egg hatches.
If you lose all your health, press Run to wake him up and use one of your lives.
The green ooze makes the screen flash red if you step on it, and if that happens, the ooze will be slowly sapping your health.
The small green weeds that shoot out pollen from the ceiling can be hit by jumping into them from underneath.
2-4
In this stage, you'll see a castle in the distance.
The purple pterodactyls usually fly around its babies on the ground, and you can easily destroy them all with either headbutts or with invincibility.
There's another quicksand area with plants and trees that you can use as platforms; using the trees will net you more smiley faces.
The dragonflies will drop rolling mollusk enemies that roll at you near the end.
2-5
This section takes place in a dark forest.
Jump into the green part of the vine to start swinging, and wait for the vine to swing where you want to go before jumping off so you get launched in that direction.
Enemies include frogs that hop up and down and mosquitoes that fly forward in a zig-zag pattern. Also, avoid the brown water at the bottom; it saps your health slowly much like the green ooze in 2-3.
The blue dinosaur acts as a series of platforms that move up and down as you trek across the nasty brown swamp water. The heads of the dinosaurs also shoot a geyser upwards, which can allow you to grab some food in the treetops.
2-6
Here, you'll be climbing some trees. Press Left or Right on the Control Pad will allow you to switch sides on tree branches, allowing you to explore quite a few areas here.
The purple egg-head enemies will throw their axes. The grasshoppers move back and forth and will also fly forward, and they can be hard to hit sometimes, especially in mid-air.
2-7
There are no pits here, but you can bounce off the clouds.
You'll also see bird enemies that swoop down at you. The blue ones give you nothing save for the occasional smiley face, but the pink ones will drop either big hearts that recover all your health or big pieces of meat for instant invincibility.
The green plant provides a dark blue heart, and if you pick it up, it will increase your maximum health by one heart, making it much easier to survive. If you die, however, you'll only get three hearts refilled instead of all of them. If you lose all your lives and have to continue (which you can do as many times as you want), you lose those health extensions.
Near the skull elevator, there is a plant that swoops down, and if you jump into it, it turns into a pink flower that contains a 1-Up.
The boss here is some nerdy dinosaur with glasses. This boss splits in two and throws shurikens, and you'll have to dive into the head of the real one with a headbutt to deal damage. If you hit the real one, both copies disappear. After enough hits, the boss stops with this strategy and just jumps around and throws shurikens. Thankfully, the shurikens are destroyable.
After enough hits, the boss just teleports in and out while throwing shurikens. Wait for the boss to show up next to you, then hit the helmet on his head with an aerial headbutt. Once you destroy the helmet, you'll free the boss from mind control and you'll head to Round 3.
