Editing Marvin Marsh (section) Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.Anti-spam check. Do not fill this in!===Forgetfulness=== Marvin suffers from Alzheimer's disease and has trouble remembering things, best exemplified by his tendency to refer to his grandson as "Billy." He also confuses his granddaughter's age that she may be a child, and mentions forgetting what his former dog Patches looked like. Summary: Please note that all contributions to South Park Wiki may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here. You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see South Park Wiki:Copyrights for details). Do not submit copyrighted work without permission! Cancel Editing help (opens in new window)