The last several times I've used Laquine Ears and wanted to remove them before the bunny ears take effect (affect?) I get locked onto the Codex Appearance screen menu after I've removed them. Hitting back puts me in an endless cycle of back buttons that takes me to the Codex Appearance screen menu every other time I hit back. However, if I go to say the Stat screen or the Description screen I can then hit back and get out of the Codex.