King's Knight/Items

Level items
Each character can be powered up by four particular items. Each item raises the character's level by one for each item collected. The maximum level that any character can reach is 20.

Spell elements
Each character has the ability to cast a spell in the fifth and final stage as long as all four of a particular element are collected by each of the characters in their own respective stages. As long as all four of a particular element are collected, the character who corresponds to that element can cast the spell with at a certain point along the way.