I would like to introduce Megaten, a mmorpg from SMT (Shin Megami Tensei) series, if you don't know what SMT is : SMT is about you trying to save the world from demons (more like from humans controlling demons to destroy the world) by fighting them. On your quest, you can befriend demons and make them fight along with you, you can also fuse them together in order to get stronger demons. It is a bit liek Pokemon ^^, but it is more like trying to get the Ultimate demon recipe ^^, there are infinity of possibilities, since the fused demons inherit the skills from the previous demons, it is up to you to find one/all of them. I hope to see in game ^^.

Here is a link: http://megaten.aeriagames.com/