gas
No. It can also be a liquid.
Assuming you mean physically, they are not solid forms.
None of the above. A rainbow is a visual effect produced by light refraction, not a substance. Solids and liquids can both produce rainbows.
No, a rainbow is just an illusion of colors given off by a drop of water when light shines though it. More often, when the sun's rays shine through one or more drops of rain.
In the middle of the game or around there, You would see sunjlight coming from a window that's in the castel. Once you see it is there, zoom in and look at the window/sunlight. You will be teleported to the Rainbow Tower place. There is a star and a button to make "?" Blocks solid.
The rainbow does not have pink in it.
Rainbow Racers Rainbow Racers Rainbow Racers Rainbow Racers Rainbow Racers Rainbow Racers
Post-humaniously awarded
Rainbow Batter, rainbow frosting and rainbow sprinkles in a rainbow cupcake liner
The rainbow represents peace.
Rainbow Ponyta looks like a rainbow