On 4th generation, it is definitely my Shiny Latias. It took a lot of effort and to get, but I don't regret it. In order to get it, I bought a second copy of HeartGold since it was on sale, costing less than 1/3 of the original price, and I really didn't want to restart the file on my first copy. First, I had to RNG my ID/SID which was hard, it took me 27 tries to get it right. Then play through the game which wasn't fun since I don't like the game as much as most other games in the series. After that, I could catch all the legendaries, including my Latias. Timid Nature, IVs are 31/7/31/31/31/31 which is what I went for. Very happy about it. After doing all of that, I have barely touched the game since I see no reason to keep playing it.