Other mistake: During the Sekai Taikai tournament, all of the characters and extras wear new, pristine gis (karate uniforms) that never seem to get dirty. As they use their own gear, you would expect at least some wear and tear from previous use, or some marks from the fights, training, sweating, etc., to show occasionally, but the uniforms all seem brand-new all the time.
Suggested correction: It's not uncommon for competitors to bring multiple gis to a tournament; perhaps the participants were told to always have a fresh uniform for the cameras.
Even if they brought multiple gis, you would expect to see some wear and tear, or marks from previous contests. Also, several of the contestants are high school students from low- or middle-income families; they would not be able to afford buying several brand new uniforms for a single contest.
Maybe the tournament organisers supplied the uniforms?
