What foreign country is credited for making the wave popular worldwide?
The history of "the wave" is an object of some controversy, but it appears to have started in Canada in 1980, gained momentum in the United States, and then became a global phenomenon at th 1986 World Cup in Mexico. See the Related Question for more details.
Very popular. Batman Begins grossed $373,298,774 worldwide. The Dark Knight grossed $1,002,891,258 worldwide. The Dark Knight Rises grossed $1,079,017,344 worldwide. And those are just the ones directed by Christopher Nolan! In total, all of the Batman movies in theaters grossed about $3,708,227,649 worldwide.
The most active sport worldwide, by far is Soccer (football, futbol). Played by just about every country in the world. More popular in North America, South America, Europe, and Africa. Asia isn't into soccer as much as a whole but it is still popular. Many Hmong people play soccer. Not sure about Australia.