Pokémon 4D: Pikachu's Ocean Adventure (partially found 4D short of anime; 2006)
From The Lost Media Wiki
Pokémon 4D: Pikachu's Ocean Adventure (ポケモン3Dアドベンチャー ピカチュウの海洋アドベンチャー, Pokémon 3D Adventure: Pikachu no Kaiyō Adventure) is a short anime film that was shown in 4D. It is the second 3D Pokémon short. It had a limited run in Japan in select theaters starting in 2006. It was later dubbed into English and premiered at the IMAX 3D Theater at Jordan's Furniture in Avon, Massachusetts. It was distributed by SimEx-Iwerks. It played there for a while, but it is no longer playing. SimEx-Iwerks claims their rights to the film have expired. It is not currently playing anywhere, and as such it is unavailable.