Part Time MBA

The part-time MBA degree is a full-time program equivalent coursework but over a flexible longer period from 2-3 years. Students can continue in employment as classes are held at campus during evenings, or off-office-hour or over weekends.
The Eligibility for this MBA program is that you should be a graduate and admission is direct without any entrance exam. It covers the curriculum topics sufficiently but has less focus on internships.
Traditionally, these programs would require you to be on-campus for classes, so would be best suited to candidates who live in relatively near to the school. Part time MBA is a very hectic schedule with daily work and study. But, the fees are less than full-time MBA.

If you just want to get an "MBA" degree then you can go ahead for part-time MBA. It won't teach you much, you will have to appear for exams and you have a degree with minimal value to help in your career.
The reason people do part-time MBA is, sometime helps them to get promotion in their current jobs. There may be a situation where your promotion is avoided since you don't have a advance degree in comparison to your peers. I have seen some big hot shot corporate biggies who don't have a full time MBA degree and their employer don't know about this. They just used a part-time MBA degree to jump few ladders in corporate world. Keep in mind some institutions offer part-time MBA degree without mentioning anything about part-time in degree certificate.