Joyeuse

The Joyeuse is the final weapon of Sir Percival. With this final weapon, Percival can run much faster, her flame tornado is bigger and stronger, her attack range is bigger, and she is capable of shooting a fireball when holding up on the analog stick and swinging the Wii remote. Also, while this weapon is equipped, Percival's Soul Gauge is instantly full at the start of each stage. This weapon is obtained with 2 Medals of Percival, 3 Steel Rapiers, 2 Ice Crystals, and 2 Wavestones.

Trivia

 * This sword also appears in the Castlevania series, where it is described as/shown to be made of gold. Oddly though, none of the ingredients involve gold in some way for Sir Percival's version.
 * If you look closely at it, the hilt looks surprisingly like Blaze's head.