Watch Dark Cloud 2 Part 8 from spoonshiro on www.twitch.tv
I caught the Baron Garayan, too.
Information on exactly how it's done is inconsistent across the internet (and seemingly in the game too), but what got it for me was:
- Lure rod with a Fork is required, so you will need to recruit Olivie first.
- Heim Rada hot springs between 4-9 PM (save at 3:30 or so, then reload if you miss it)
- The way the Lure Rod works is that you have to input combinations of movements to catch specific fish. This time it was pressing Left-Right four times, reeling for about one second, and then repeating until he bites.
- Once he does, hit Down on the analog stick to snag him, then just reel him in like you would any other fish. It can be done even with a completely non-upgraded Lure Rod (which I did here), but do be careful not to snap your line. Tap the button to reel him in bit by bit and tap the direction of the arrow when it pops up to reduce tension. It'll take about 2-3 minutes, but be patient and you'll get him.
I also made judicious use of the fish duplication bug (courtesy of the always awesome Pokemonfan4000) and got myself an uberfish, which I used to win the Master Class in the Finny Frenzy.
Watch Dark Cloud 2 - Finny Frenzy from spoonshiro on www.twitch.tv
Unfortunately it seems you can only win one prize per Finny Frenzy. There also seems to be a hard upper limit on how many points you have on any single fish (about 400). Once you go above that threshold, the game freezes.