Fat Undyne

After leaving the underground, undyne still kept her intense routine. She then decided to do self defense training for a little while, but she was permanently banned from doing those lessons cause she almost killed someone. So, for the first time in her life, she relaxed. She didn't train, she just laid on the couch. That was until she tried human junk food. She started gorfing every bit of junk food she smelt. But since her body wasnt used to all this human food, she gained weight real quick. And only after 1 week of eating her first chip, she already gained 450 pounds and is now a slob.