In Cemu, go to Options > GamePad motion source . Set it to Default . Then map a keyboard key to Right Click (Touch) . You must hold the right click and drag to simulate the stylus.
Beyond the technical hurdles, there are also legal and ethical considerations to playing games via ROMs. The production, distribution, and possession of game ROMs for titles that are still under copyright (which is the case with "Batman: Arkham City") can be considered copyright infringement. Game developers and publishers invest significant resources into game development, and the distribution of ROMs cuts into their potential sales and revenue. batman arkham city wii u rom