Well, Pacquiao has actually fought in Mexico, and he's got a pretty big following there. But, just because he's fought in Mexico and has Mexican fans, does that make him Mexican? Not quite, but it's still a pretty cool connection, don't you think? It's like how objects in motion can have a big impact, even if they're not from the same place.
In fact, Pacquiao is often compared to other famous boxers, like Oscar De La Hoya, who is Mexican-American. But, while they might have some similarities, they're also from different cultural backgrounds. It's like comparing apples and oranges, they're both delicious, but they're not the same thing.