JRC Level

This area is found late in the game. You need the keys to J, R and C. All three doors lead to other doors to other parts of the level.

The J door links to the area where the Gold Trophy drops in.

The R door links to the area where the Silver Trophy drops in.

The C door links to the rest of the level. Once you drop down and press the red button, you can't return, so you'll have to prepare the J and R areas ahead of time.

Pressing the buttons near the J area will fire a Red Gun and drop a box with the Gold Trophy in it. Set up with bombs, guns or boxes or other items so that you can access the Gold Trophy.

Pressing the buttons near the R area will fire a Green Gun and drop an ice box with the Silver Trophy in it. Set up with bombs, guns or boxes or other items so that you can access the Silver Trophy.

Press the button on the far right to drop the Bronze Trophy in.

In the middle of the level, there's another trophy collector. Unlike the collector in the save room, this one will reset when you die/reset so you'll need to collect all the gems and trophies in one go. (Or, bring the trophies to the save room and return). You'll need:
 * 7 Blue Gems (6 provided)
 * 3 Green Gems (2 provided)
 * 1 Silver Gem
 * 1 Black Gem
 * 1 Gold Trophy
 * 1 Silver Trophy
 * 1 Bronze Trophy

If you get all the above items, you win the game (1 of 3 endings)! The Vault is unlocked in A Level.

There is also a door back to A Level, way up top near the top of Z/U Key tower.