Long-time Pokemon producer and designer Junichi Masuda competed in the Pokemon Go Invitational, the very first official Pokemon Go tournament ever, at the Pokemon World Championships. Rather than outfit his team with the most powerful, commonly-seen competitive Pokemon, he brought his well-known favorite: Psyduck.
In his first battle against Poké AK, Masuda humorously (and un-strategically) seemed to save all three shields to keep his Psyduck alive as long as possible. Later in the best three out of five match-up, Masuda replaced Psyduck with another odd duck: Ludicolo. Poké AK took the match 3-0, and went on to finish the tournament at second place.
More popular Pokemon at the Pokemon Go Invitational included, for example, Skarmory, Altaria, Defense Deoxys, and Umbreon. Masuda did have an Umbreon, but the casters pointed out that, unfortunately, it lacked the Community Day exclusive move Last Resort, which may have made a difference in its performance.