In 1992, Banpresto released a soccer game for the Super Famicom called Battle Soccer: Field no Hasha in which Gundam mecha, Kamen Rider, Ultraman, Godzilla and other kaiju played each other in soccer.
Haro is the ball, while Ultraman and Kamen Rider are the refs.
YouTuber Hiiro has been creating computer animations of soccer-playing mobile suits.
The ensuing parody is delightful. This isn’t a first.