Have you ever wondered why there's a solution for the puzzle inside the treasure room after beating a trial? Well I have found out! It's... rather disappointing. It's just the same solution you used to get in, with two missing. So, incase you were wondering what it was, then there you go.
Oh, thank you. I've only three out of four treasure rooms as of right now. I figured out the 5th code, but I guess I need to get the fourth treasure room before I can put it in.
The best way to put the secret code in, for the final gnome battle, is to use Microsoft Paint as a guide. It's a bit difficult where the missing two symbols are from each trial, but if you use Microsoft paint as a guide, and list the missing symbols in a different color, you'll put together the final code easily.
For example: If you completed the red trial, list the eight symbols in red using Microsoft paint, and after you defeat the red boss and enter the respective room with the chest in it, two of those symbols will be hidden. List the two hidden symbols in either black or white on the same list. Repeat the process with the yellow, green and blue trials. The hidden symbols will be in different places for each one.
This is what I mean (the codes might be different for everyone):
When you do go up against the rainbow king, there's no-nonsense coming from him. As the Trials of Gnomus is restricted to Normal difficulty, it adds to the difficulty of survival.
For me, I used the Iron Citron not because of his Iron Mode, but because he gets back some of his health after entering Iron Mode when he's below half-full. When I engaged Iron Mode at the right time, I went on and led the fight against the Rainbow King, and got him in the end.
If you don't have Iron Citron, then (as realitysquared mentioned) use the Vampire Flower.
