Castlevania: The Dracula X Chronicles PSP Cheats

Special Play Modes

Entry Location:
After completing the game once with Alucard, you can play in special modes by entering the following names when starting a game

X-X!V''Q - Play as Alucard, with 99 luck and the Lapis lazuli (+20 luck) accessory (completing the game isn't required)
AXEARMOR - Play as Alucard, with the Axe Lord armor
MARIA - Play as Maria Renard
RICHTER - Play as Richter Belmont

Level Select

Entry Location:
Enter this as your name while playing the original Rondo of Blood to access the level select mode

X-X!V''Q - Level Select for Rondo of Blood 

Unlock Symphony of the Night

In Stage 2, while the minotaur is chasing Richter, immediately fall into the first hole in the ground. You will not die, but instead be taken into the sewers. Play the level out normally and defeat the boss. Afterwards, you will be taken to Stage 3' (this is different from the normal Stage 3!).

In Stage 3', whenever the path branches, taken the upper route. Make sure you obtain the "axe" subweapon sometime during the stage. Eventually, you will meet a skeletal snake that is attached to a wall. Nearby is a vine-like cage; use the axe to cut it. It now serves as a platform for Richter to jump to the upper ledges. Continue along the upper ledges until you see a breakable tombstone. Inside is the item that unlocks Symphony of the Night. Return to the main menu to play it.