@CRAZY - Clear the game to unlock Crazy difficulty. Use as profile name.

@TREVOR - Clear the game to play Trevor Belmont. Use as profile name.

Moebius Brooch - Clear the game on Crazy difficulty to unlock this item in the shop.

Boss Rush Mode - Clear the game and defeat the optional bosses to unlock this mode in the warp rooms.

Sound Test - Clear Boss Rush to unlock. Go to a warp room to find the music box item which will allow access to the sound test.

Submitted by g_dracula
Verified by Berserker Kev, Tim Bu

In the Forest of Jigramunt at the starting point head East. Once you have cleared the Vassago Lv.25 and two Sniper Orc Lv.24, the Spirit Lv.19 enemy will continually respawn in pairs. They drop a ton of Evo Crystals if you kill them with one blow. Use the Brooch item to give all the experience to your I.D. This is an easy way to see all of the forms of the I.D. and to level up the ones you'll use the most.

In order to reach the optional bosses -- Legion and Nuculais -- you first must obtain the fifth Innocent Devil (Devil Type). With this, head back to Garibaldi Temple and slide under the crack in the wall back near the area with the four courtyards and Fencers. Proceed through the hallways, avoiding the Blood Bones and eventually you'll be in a hallway that is living. Save before you enter the boss area and make sure you're at least at level 50 or expect a tough fight.

As you may of noticed, throughout the game there are various chairs you must sit in. If you happen to sit in them all, the room inside Cordova Town (the one that is pretty colorful with blue cloudy skies twirly around while little wierd rabbit/bug creatures are flying around with a target sign on their gut) will obtain a special chair in the center, though it really doesn't do anything for you, it's a nice little extra quest that you can do.