How does Wonder Guard interact with Tera Rock and Flying Press?

Question

So I was playing a Pokémon fangame recently (I know we're not supposed to talk about non-official games, but hear me out) that had gens 1-9 and tera. I used a tera Rock Shedinja against a Hawlucha. The Hawlucha used Flying Press, and it hit even though it wasn't super effective. (Also, it didn't have mold breaker)

This made me want to know how this scenario would play out in an actual Pokémon game, but since Shedinja isn't in Gen 9, Natdex AG on Showdown! is the only place where we could test this. Could someone test this on Showdown! to see what would actually happen in this scenario?

Answer 1

In Pokémon Showdown, Flying Press doesn't bypass Wonder Guard when Shedinja Terastalizes into a Rock-Type. Naturally, this is because Flying Press is not super-effective against it.

Showdown Test