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The Pikachu worm was the first worm aimed at children. It was sent in the form of an email, and named after the character existing in the Pokemon franchise. The message said Pikachu is your friend. When users opened the attachment, it showed a pensive Pikachu, and text that read "Between millions of people around the world I found you. Don't forget to remember this day every time MY FRIEND!", with an nonworking link to 'pikachu.com'.
The worm was sent to everyone in that person's address book and would send the prompt: delc://WINDOWS. However, the virus was not well coded and windows would prompt the user to confirm the action.