1.) Megaman Zero 3 and Megman Zero 4 bonus
If you insert either a copy of the GBA Megaman Zero 3 or Megaman Zero 4 in the GBA slot of the DS when starting a game. The bosses that were found in the GBA versions will be found throughout Megaman ZX. Do you have what it takes to defeat them?

2.) Get A Birthday Cake
Change the day to your birthday then go to area c-1 and take to Sherry, Sherry is in one of the building that has a dark door. Cake restores 8 points of life.

3.) Purpose of the Doll
The doll in Prairie's room isn't just there for decoration or to attack just for fun. If you continually strike the doll with attacks, in time it will drop a "W Can." The "W Can" or Weapon Can refills all of the weapon energy for all of the Live Metals. The doll will only drop it if you don't already have one. So return to the doll after you use the W Can to get another one. Cutting the doll from its string makes obtaining the item much easier.