Allatori Obfuscator comes with the plugin for the Sun Java Wireless Toolkit for CLDC, thus making the obfuscation of your J2ME applications very easy. Moreover, Allatori automatically generates a configuration file for your WTK project.

After setting up the plugin you will just need to select "Project | Package | Create Obfuscated Package" menu option in the KToolBar to get an obfuscated application.