If you’re a tester, you may want to know that Wonder Trades in all currently supported Pokémon games for testers (X, Y, Omega Ruby and Alpha Sapphire) is currently down.
You’ll get error code 006-0501 when trying to access Wonder Trades. This is due to an issue with checking whether a Pokémon is legal, and we don’t currently know when this’ll be resolved.
According to information I’ve received, this has been an issue since around 2024-12-01T00:00:00Z at least.