I'll post up the full answers with our reasoning for them later today, after the winners have been chosen.
I will say now however that Mt Fuji Surfing Pikachu is *not* the correct answer. Surfing Pikachu is a card which was printed in English. The Mt Fuji version is simply a different art variant of that card. The question asked for a card which "was never physically released in English (in any edition or reprint)". The intended answer was Imakuni?, which really should've been the first thing anyone who'd played that game would think of. There are some other answers we're accepting for early entrants who got in before the question was reworded, but we'll get to those in the full write-up.