Disgaea 2: Dark Hero Days/New monsters
 Saber Kitty
Saber Kitties were originally a monster class in the NIS title "Makai Kingdom: Chronicles of the Sacred Tome." These are unlockable at the start of Axel Mode. Their ATK power increases based on how many soaces they have moved. Therefore, outfitting a Saber Kitty with Shoes is a good move for new players.
These monsters were originally classes in Disgaea: Hour of Darkness and it's remakes. They specialize in pure strength and ATK power.
 Mass Produced Kurtis
These robots are available for creation after beating the second stage of Kurtis's mini-storyline in the main story. Can be created in Axel Mode if unlocked during the main story. Cannot be unlocked in Axel Mode through any other means.