The game you're referring to seems to be a part of a series that initially wasn't widely released outside of Japan, but fan translations and ROM hacks have made some of these games accessible in other languages, including Spanish.
First, let's address the availability and legality. "Dragon Ball Heroes: Ultimate Mission" is a series of games based on the Dragon Ball universe, and there are several titles under this umbrella. However, not all of them might be directly referred to as "Ultimate Mission" in their titles, but there are games like "Dragon Ball Heroes: Ultimate Mission" and sequels or related titles.