How do you make sims really fat on sims 2?

you cant

Create them that way or else make them eat when they aren't hungry a lot and they will gain weight.

You need to go to a community lot and wait until a witch arrives. Then, befriend the witch and when you have done so, there should be an interaction saying "Teach me the ways of the ...". -A

You need Sims 2 Pets Expansion Pack. When you have it, at night a dog (Wolf, you can tell it's a wolf because it will have glowing yellow eyes) and all you have to do is greet, and then become pet...