3rd Gen Jirachi

In Generation III, the only way to get a Jirachi was the Pokémon Colosseum bonus disk or through the Pokémon Channel game,. Well, the European version of the game, anyway. The American Region of Pokémon Channel does NOT contain Jirachi. Were you ever to obtain Jirachi in the Generation III games?

I did once yeah, it was the wishmaker Jirachi. Don't remember how exactly, as I've never owned Colosseum, but I'm pretty sure it was a legit one.

It might still exist on one of my save files, I'd just have to check

I never got Jirachi from an official event: I had to get mine via trade from someone who apparently cheated to get one. But even after getting Jirachi, it just sat in my PC since I never used it.