Golden Sun
October 18 2014, 9:10pm
I might focus more on the battle mode/arena. If someone would like to team up with me on this, feel free.. I'll probably get to the first boss myself in the main story, but that's about it.. I'll find as many code notes as possible.
Missable achievement Ideas:
Get the Rare weapon - Kikuichimonji.
Find Crossbone Island.
Defeat Deadbeard.
Bad Ending (Can re-load, fight final boss again, and get better ending)
Good ending.. obviously,
Wear a Cleric's Ring with any of the cursed weapons:
(Demon Axe, Wicked Mace, Muramasa, Demonic Staff, Demon Mail, Thunder Crown).
Getting all Djinn, use Judgement Summon, all summons.
And something to do with Lucky Medals, like maybe get one of the exclusive equipment:
http://goldensun.wikia.com/wiki/Lucky_Medal_Fountains
October 30 2014, 2:03am, last edited October 30 2014, 2:07am
There needs to be an achievement for clearing Mercury Lighthouse before Kolimas Giant Tree. since you are supposed to grab mia do the tree then do the lighthouse by the games suggestion but you actually dont have too
Also obligatory

October 30 2014, 2:16am
Uploaded 35 achievements today, more coming. I have the [Complete the Game] achievement finished, that was so easy to code. Just got to fill in all the challenges and optional sidequests.
May 10 2015, 12:45am
240-400
160
Lighthouse#1 (25)
Water Beast (5)
Desert Beast (5)
----Lighthouse#2 (split 25/25)(already part of 240)
Save Hammet (5)
Tornado DDT (5)
Crossbone (10)
Deadbeard (15)
Return to Vault (5)
Save Hsu (5)
Beat Colosso (5)
---85 so far
Cloak (2)
Force (2)
Summons (2)(2)(2)(2)
lvl 1 (1)1)1)1)
lvl 2 (1)1)1)1)
lvl 3 (1)1)1)1)
cursed Ring + gear (2)
Revive (1)
Ragnarok (1)
Planet Diver (1)
Protector (1)
Inferno (1)
Bind (1)
High Impact (1)
Resist (1)
Wish Well (1)
Break (1)
---(109) so far
Cleric+cursed (2)
Medals + no hit (2)
kikumunji (2)
assassin blade (1)
spirit armor (1)
spirit shield (1)
God of War (30)
400!!!
June 10 2015, 3:49pm, last edited June 11 2015, 4:45am
Edit: Nevermind, I found out it was from me using save states.
November 27 2015, 12:47am
Note: With so many info to add, I have have placed some notes slightly incorrect, like say item artifacts not belonging to the address specified (though they should match with the area they should be)...
Addresses 0x8400, 0x8402 can be used for both the area and battle encounter. Example [01fe, 012e] should trigger Deadbear's battle. (It seems all battles start with 01fe and the other value is the one that changes accordingly to the battle formation...)
November 27 2015, 5:10am
April 2 2016, 8:57pm
- Progression (=bosses)
- Sidequests (Deadbeard, Hammet) and minor optional stuff (Win Colosso, Hsu, Crossbone Isle by ship, Isaac's mom, Bandits escape, Girl in river)
- Obtain rare weapons
Other:
- Clear Mercury Lighthouse before Kolimas Giant Tree (Challenge, different dialogue)
- Clear Altin Peak before picking up the Orb of Force (Different dialogue)
- Don't defeat Storm Lizard but outrun him (Fun little challenge, can come back later to defeat him)
These 3 are missable and so is most of the minor optional stuff.
Feel free to suggest achievement ideas I missed. I didn't do anything with specific fighting styles (Classes, Summons) because they are related to the Djinn you have and because summoning changes your class in battle, so idk what achievement would make sense here.
Potential Golden Sun 2 achievements:
With the password system you can transfer data to

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January 15 2014, 5:04pm, last edited September 21 2022, 3:36pm
Missables
Yes.
RAGuide
No.
1. Golden Sun (USA, Europe).gba
RA Checksum: 1cdd7f33c9a27061201e1d1ce029a700
CRC32 Checksum: E1FB68E8
2. Golden Sun (Spain).gba
RA Checksum: 53d97150443e4449dc1959da641d1a8e
CRC32 Checksum: C63008D6
Resources:
GameFAQs
Longplay
Wikipedia