Wonder Girl is a pretty underratted character if you ask me. She seems like a lot of fun and has a very good set of super powers. She’s like Supergirl in a lot of ways. Still, that doesn’t mean that she is ready to take down someone like Vegeta yet. Vegeta surpasses her in all stats and that’s unlikely to change in the near future. She can make the fight interesting, but she won’t be winning it. Vegeta wins.