Of course we did! We're explorers! We like jungles!

[And they like finding monsters that threaten their lives. No biggy. She nods at Eikichi's suggestions, they do make sense. Some kind of magical protection would particularly explain a lot.]

Yeah! That's why we thought maybe Aiada would know how to open it! Or to read the symbols at least! [Giggling, she takes out her Pokédex and shows Eikichi this picture.] This cute little guy! It's one of the many creatures that came with us from our world.