How do I use PkHex to transfer a Gen 5 Pokemon to Legends Arceus

[Wicked King 1000]

I have a Lucario from White 2, and I was wondering how do I transfer it to legends arceus using pkhex.

[BlackShark]

You can't.

The Pokemon needs a HOME tracker which PKHeX can not assign, so it will be illegal.
The only way would be uploading it to HOME through Pokemon Bank. However if you don't have an ongoing subscription that's also impossible since the eShop was shut down.