Made this just now:
I don't have any experiences of GraalOnline Era, but here is an example of GraalOnline Classic for the 3DS.
Controls
Overworld Mode
D-pad: Movement
Slide pad: Drag viewing
A: Grab
B: Sword
X/Y: Items
L: Read newest/next PM
R: Read newest/next Guild Message
Start: Main menu
Select: Profile
Conversation Mode
A: Reply (brings up touchscreen keyboard)
B: Close
X: Open sender's profile
Y: Conversation history
L: Read next PM
R: Read next Guild Message
Since the game will not be using any 3DS-specific features, it will also be compatible with DS, DS Lite, and DSi devices (minus the slide pad drag-view).
Also shown in the video are several other game modes.
Online Play
The same as the game on iPhones and PC.
Requires Nintendo WFC.
Solo Play
A smaller, offline world where the player can explore and do quests in.
Multi-Play
Play with up to 7 other friends nearby via Nintendo DS ad-hoc wireless.
Games include team-based CTF or tower sieges.
Could also just be a hangout.
Transfer
Transfers your account to a new device via Nintendo DS ad-hoc wireless.
The features seem pretty basic, though I thought about also incorporating StreetPass for the 3DS version, where in the game, you have a separate friends list just for people met via StreetPass. Added characters could be used as allies in Solo Play mode.