If the light is shining down on a sun symbol, I can help you. Use the x button to zoom into first person view (well not complete first person but the closest zoom you can get), look around with the ctrl pad, and look right into the beam of light up at the sun. you will be transported to the top of the castle. If you're mario, you will get a wing cap. Controls: up: go down; down: go up (only if you have enough momentum where you've gone straight down and you have a little dust trail thingy behind you and then you can go up) left: left; right: right. fly over to the flat topped tower and hit the red ? block switch. Once you get on the flat topped tower there is no longer any way to get the secret star of this level (collect 8 red coins; requires mad skillz of wing cap flying) so jump off tower to your doom. you dont die you just reappear in the castle and the light should dissapear.
You have to complete the world five castle as mini mario.
After obtaining at least 10 stars go to the main hallway in the castle (the one you reach when you enter the castle). You will notice a spotlight on the center. Stand in the spotlight as Mario and look up at the source of the light. To activate free looking press the 'X' button. You will then enter a new area wearing a winged cap (if you're Mario. If you're not you'll just fall down). Fly to the center of the level where you'll see a big switch. Jump on the switch to unlock blocks.
probably final bowsers castle
Yoshi is on the castle roof in Super Mario 64. Three lives and a flying cap box are also up there.
Where are you, are you in the castle, have you found bowser?
To get on the castle roof of the castle
Yes!
in a castle with peach
That question doesn't make sense please retype that question they probably mean where is the switch in peach's castle and in Mario 64
When you collect 14 stars, unlock mario. a beam of light will appear in the main room at the front of the castle, zoom and look up. You will then be flying. There will be a castle tower in the center of where you are flying with a giant red switch. go down there and GROUND POUND that thing. All the boxes should turn solid.
If you are talking about the sunlight on the carpet in the castle, you have to be Mario, walk in the light. Press X to center the camera behind Mario and look all the way up.......
First you have to get to toad town