|entrance = [[Super Mario World/Yoshi's Island/Yoshi's Island 4|Yoshi's Island 4]]
|entrance=[[../Yoshi's Island 4/]]
|exit = [[Super Mario World/Donut Plains/Donut Plains 1|Donut Plains 1]]
|exit=[[../Donut Plains 1/]]
|secret_exit = ''None''
|timer=300
|time_at_start =
|difficulty = Easy
}}
}}
The first screen is a series of long fences. This place is great for getting lives. Grab the fence, and hit each of the koopas holding onto the fence from above. Note that punching any koopas through the fence (by pressing Y) will reset the count, and prevent you from getting lives. There are enough koopas to get 4 or 5 lives in this screen alone. The second screen automatically scrolls, with giant pillars dropping down trying to squish you. Avoid all the pillars by staying either at the far left of the screen, or the far right. Careful of the last pillar since there is a gap below it with moving blocks. If you are Super Mario, on the way you will be able to get a Fire Flower from a flying block. If you are small it will only be a mushroom. Once you reach the big red door, enter to fight [[Super Mario World/Bosses#Iggy Koopa|Iggy Koopa]]. Inside, there is a half platform floating on a pool of lava, tilting left and right. To defeat Iggy, you must push him off the edge into the lava. Either jump on him, or shoot him with fireballs and he will slide down the platform. By hitting him ONLY when the platform is leaning left or right, he can easily be forced into the lava.
Iggy's Castle is the first castle you'll encounter on your travels through Dinosaur Land. You won't be able to take Yoshi inside and will have to go through the castle on your own.
{{Footer Nav|game=Super Mario World|backpage=Yoshi's Island/Yoshi's Island 4|nextpage=Donut Plains}}
{{Scrolling map|SMW-YICastle-1.png}}
* The first area is comprised of a large fence that can be climbed. The controls take some getting used to: press {{snes|Up|Dpad}} to hold onto the fence, then use the Control Pad to climb around. Several Koopas will be climbing the net as well, some on your side, some on the other side, with the red ones being significantly faster than the green ones. The ones on your side can be stomped as if they were on the ground. To get rid of Koopas on the other side, press {{snes|Y}} to punch the fence, which takes them out.
* This is also a great area to accumulate a few 1-Ups. Stomping while on the net accumulates the counter as if you were stomping several enemies in a row. As long as you don't fall down or punch, you will get more and more points until you start getting 1-Ups.
* Of the group of five ? blocks, the middle one contains a flower.
* If you need the flower you will have to push the P-Switch to drop the flower down.
{{Scrolling map|SMW-YICastle-2.png}}
* Don't let the Podoboo hit you on the way across the lava pit. Wait until it has fallen back into the lava, then climb across.
* The holes allow you to get on the other side of the fence yourself by punching them. While you could use it to avoid Koopas coming your way, they're not that hard to avoid.
* Press {{snes|Up|Dpad}} when you reach the door at the end to continue onward to the next area.
{{Scrolling map|SMW-YICastle-3.png}}
* This autoscrolling map features giant logs trying to crush you, which you must avoid. Stay left of the first one, then go to the right and "drag" the screen with you and you will be relatively safe from the logs. However, you still need to watch out for the two pits on your way.
* On your way, a flying ? block will pass you which contains a flower. Take it if you have the time but don't risk your life for it.
* The huge door at the end leads to the boss of this castle...
==Iggy Koopa==
[[File:SMW-YICastle-4.png|right|Iggy Koopa]]
Iggy Koopa is the first {{s|Enemies|Koopa}} boss in the game. He is stationed on a tilting platform that bobs back and forth on lava. He must be knocked off the platform into the lava to be defeated. To do this, you must jump on his head. He will move in whatever direction the platform is slanted towards. If you're Fire Mario, his fireballs have the same effect and are easier to use. Cape Spins have no effect. Iggy will very occasionally try to launch a fireball if he's left alone for too long. If you keep stomping on him, however, he will never retaliate.
Once Iggy is defeated, you will be able to watch a scene where Mario destroys Iggy's Castle. You will then automatically march on to the Donut Plains.
{{Footer Nav|game=Super Mario World|prevpage=Yoshi's Island 4|nextpage=Donut Plains}}
Iggy's Castle is the first castle you'll encounter on your travels through Dinosaur Land. You won't be able to take Yoshi inside and will have to go through the castle on your own.
The first area is comprised of a large fence that can be climbed. The controls take some getting used to: press to hold onto the fence, then use the Control Pad to climb around. Several Koopas will be climbing the net as well, some on your side, some on the other side, with the red ones being significantly faster than the green ones. The ones on your side can be stomped as if they were on the ground. To get rid of Koopas on the other side, press to punch the fence, which takes them out.
This is also a great area to accumulate a few 1-Ups. Stomping while on the net accumulates the counter as if you were stomping several enemies in a row. As long as you don't fall down or punch, you will get more and more points until you start getting 1-Ups.
Of the group of five ? blocks, the middle one contains a flower.
If you need the flower you will have to push the P-Switch to drop the flower down.
Don't let the Podoboo hit you on the way across the lava pit. Wait until it has fallen back into the lava, then climb across.
The holes allow you to get on the other side of the fence yourself by punching them. While you could use it to avoid Koopas coming your way, they're not that hard to avoid.
Press when you reach the door at the end to continue onward to the next area.
This autoscrolling map features giant logs trying to crush you, which you must avoid. Stay left of the first one, then go to the right and "drag" the screen with you and you will be relatively safe from the logs. However, you still need to watch out for the two pits on your way.
On your way, a flying ? block will pass you which contains a flower. Take it if you have the time but don't risk your life for it.
The huge door at the end leads to the boss of this castle...
Iggy Koopa is the first Koopa boss in the game. He is stationed on a tilting platform that bobs back and forth on lava. He must be knocked off the platform into the lava to be defeated. To do this, you must jump on his head. He will move in whatever direction the platform is slanted towards. If you're Fire Mario, his fireballs have the same effect and are easier to use. Cape Spins have no effect. Iggy will very occasionally try to launch a fireball if he's left alone for too long. If you keep stomping on him, however, he will never retaliate.
Once Iggy is defeated, you will be able to watch a scene where Mario destroys Iggy's Castle. You will then automatically march on to the Donut Plains.
to hold onto the fence, then use the Control Pad to climb around. Several Koopas will be climbing the net as well, some on your side, some on the other side, with the red ones being significantly faster than the green ones. The ones on your side can be stomped as if they were on the ground. To get rid of Koopas on the other side, press 
to punch the fence, which takes them out.
