shining force 2 configuration mode
For anyone curious about my Debug Mode "Any%"

Disclaimer: I have no idea if there's anything in this that can damage any actual cartridge or hardware but I wouldn't rule it out. Although I'm not sure it's possible to do the inputs quickly enough to get it to work without some 3rd party accessory.

Edit: I forgot about this when writing this up originally, but during an attack in debug mode holding left lowers the damage done (Bowie takes 1 damage from Gizmos, for example). Holding right forces Double Attack + Counter, all evades for normal attacks or a heavy attack with magic. 

Update: 9/20/18 It just occurred to me to try holding left and right with stat boosting items. Left forces a +4 boost, Right forces +2. Confirmed only with Power Water, but I assume it's the same with any stat boosting items except, of course, the Running Pimento.

Update 11/30/15: Forgot to update this with the new debug cheat I found on Shining Force Central Forums. Hold A+B+C+UP in Battle, and after any turn ends all enemies will die and the battle will end in victory. It does not matter if an action was chosen or not.

The inputs to enable the debug mode are Up, Right, Left, Down, B, C on repeat until you hear the "Character has been cursed" sound effect. These buttons need to be input absurdly quickly. I set up a macro to press a button, wait 5 milliseconds, release, wait 5 milliseconds, etc. The default "wait" period in my program is 64 milliseconds but this proved to be too long and the code would not work.
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Update: 02/07/18: I've found a new debug code that works without ridiculously impossible inputs, but it's still more difficult than the config menu code. It's Up, Down, Up, B, C, Right, Left, Up, Down, Up, B, C, Right, Left. This method does NOT also trigger the config menu like the previous method does but is otherwise identical. If you hold up after the cursed jingle confirmation tone you will get a battle select option. Holding down instead gives an option that allows you to start the game in various different locations.

Sometimes the game crashes immediately after the screen fades to black after the Sega logo. Reset and try again. In my experience, it works more often than not. Twice I have accessed a Battle Select screen. There is supposed to be a different code for that but I have not been successful in using it. If you access it, 0 is the end game all bosses battle, 1-43 for Gizmos to Zeon, 44 for the Elven Village battle. There are also a few unused numbers that can be selected but will crash the game.

Once input, you can still access configuration mode options to enable turbo. Once in game, you can hold B to move through any objects except characters. This also works in battle, however the B button will still attempt to send you back to your original position unless you also move on to a tile you normally cannot enter. This will cause the game to fail to move you back. Once you're a fair distance away from your starting position you can come back in bounds and move wherever you like, however you need to hold B and a direction and the game will attempt to return you to your starting tile every space. It's quite time-consuming.

In battle if you do an action that requires you to target someone, (Attack, Magic, Item use) Hold Start when you confirm the action and a box with a number will appear in the top right of the screen. You can change the number and select 0-6. Pressing B at any time while doing this will likely crash your game. (Note: Egress does not trigger this)

0: Normal Attack vs. any character. Once selected, another number selection appears, defaulting to 128. This selects a character. A full list of the all numbers and what they mean is further down the page. In short: 0-29 = Force Members. 128+ are enemies. 128 is always the "boss" of the battle. Even battles that require everyone to be killed have a "boss" character.
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1: Cast any spell on any character. Once selected, another number selection appears, 1-4. This is the level of the spell. After choosing a level another number selection appears to choose a spell, 0-42. A full list of spells is further down. A few fun choices are 19 (Demon Breath), 32 (Atlas), and 41 (Strong Fire Breath) After that is the Character select.

2: Use any item on any character. Another number selection appears to choose an item, 0-127. A full list of items is further down. Once you choose a character, another number selection appears, 0-3. These correspond to the character's item slots. If using a consumable, the item in that slot (if any) will be consumed. I presume if using an item such as the power ring, the item in the slot can be damaged but I have not tried it. You can select an empty slot of course but I have no idea what might happen if an empty slot were to become "damaged"

3: This shows the battle scene where attacks are played out. Nothing happens, and the scene ends.

4: Burst Rock effect. The current character explodes, damages everything nearby, and dies.

5: I believe this is the "your character is muddled and does nothing this turn" effect.
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6: Prism Flower Laser. I've tried this once. I did not get to choose a target, nothing was hit, the backdrop in the battle scene changed to a grassy area, the character could no longer move normally, and after the battle was over the scene after the Prism Flower battle plays. This scene will replace any scene that should play after the battle you're in and may result in a soft lock.

Character List:
0-Bowie
1-Sarah
2-Chester
3-Jaha
4-Kazin
5-Slade
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6-Kiwi
7-Peter
8-May
9-Gerhalt
10-Luke
11-Rohde
12-Rick
13-Elric
14-Eric
15-Karna
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16-Randolf
17-Tyrin
18-Janet
19-Higins
20-Skreech
21-Taya
22-Frayja
23-Jaro
24-Gyan
25-Sheela
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26-Zynk
27-Chaz
28-Lemon
29-Claude
128-Enemy Boss
129+Each number after 128 is another enemy.
Selection of a number assigned to no one may result in the action doing nothing, or it may crash the game. Spells seem to cast but do nothing while normal attacks crash the game. I'm not sure about items.

Spell List:
0-Heal
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1-Aura
2-Detox
3-Boost
4-Slow
5-Attack
6-Dispel
7-Muddle
8-Desoul
9-Sleep
10-Egress
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11-Blaze
12-Freeze
13-Bolt
14-Blast
15-Demon's Smile (absorbs magic points)
16-Healin (Heal, single target)
17-Belch out flames (weak version)
18-Blew out a snowstorm
19-Demon Breath
20-Power (Power Water effect)
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21-Guard (Protect Milk effect)
22-Speed (Quick Chicken effect)
23-Idaten (Running Pimento effect)
24-Health (Cheerful Bread effect)
25-B. Rock (Burst Rock Visual Effect - Does nothing)
26-Laser (Part of the Prism Flower Attack maybe? - Does nothing)
27-Katon 
28-Raijin 
29-Dao 
30-Apollo 
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31-Neptun 
32-Atlas 
33-Powder (Fairy Powder effect?)
34-G. Tear (Fairy Tear effect)
35-Hanny (Bright Honey effect)
36-Brave (Brave Apple effect)
37-F. Ball (Blaze 3, single target)
38-Brezad (Freeze 3, single target)
39-Thunder (Bolt 3, single target)
40-Aqua Breath
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41-Belch out flames (strong version)
42-Shine (recovers magic points)

Item List:
0-Medical Herb
1-Healing Seed
2-Healing Drop
3-Antidote
4-Angel Wing
5-Fairy Powder
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6-Healing Water
7-Fairy Tear
8-Healing Rain
9-Power Water
10-Protect Milk
11-Quick Chicken
12-Running Pimento
13-Cheerful Bread
14-Bright Honey
15-Brave Apple
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16-Shining Ball
17-Blizzard
18-Holy Thunder
19-Power Ring
20-Protect Ring
21-Quick Ring
22-Running Ring
23-White Ring
24-Black Ring
25-Evil Ring
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26-Leather Glove
27-Power Glove
28-Brass Knuckles
29-Iron Knuckles
30-Misty Knuckles
31-Giant Knuckles
32-Evil Knuckles
33-Short Axe
34-Hand Axe
35-Middle Axe
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36-Power Axe
37-Battle Axe
38-Large Axe
39-Great Axe
40-Heat Axe
41-Atlas Axe
42-Ground Axe
43-Rune Axe
44-Evil Axe
45-Wooden Arrow
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46-Iron Arrow
47-Steel Arrow
48-Robin Arrow
49-Assault Shell
50-Great Shot
51-Nazca Cannon
52-Buster Shot
53-Hyper Cannon
54-Grand Cannon
55-Evil Shot
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56-Wooden Stick
57-Short Sword
58-Middle Sword
59-Long Sword
60-Steel Sword
61-Achilles Sword
62-Broad Sword
63-Buster Sword
64-Great Sword
65-Critical Sword
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66-Battle Sword
67-Force Sword
68-Counter Sword
69-Levanter
70-Dark Sword
71-Wooden Sword
72-Short Spear
73-Bronze Lance
74-Spear
75-Steel Lance
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76-Power Spear
77-Heavy Lance
78-Javelin
79-Chrome Lance
80-Valkyrie
81-Holy Lance
82-Mist Javelin
83-Halberd
84-Evil Lance
85-Wooden Rod
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86-Short Rod
87-Bronze Rod
88-Iron Rod
89-Power Stick
90-Flail
91-Guardian Staff
92-Indra Staff
93-Mage Staff
94-Wish Staff
95-Great Rod
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96-Supply Staff
97-Holy Staff
98-Freeze Staff
99-Goddess Staff
100-Mystery Staff
101-Demon Rod
102-Iron Rod
103-Short Knife
104-Dagger
105-Knife
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106-Thieve's Dagger
107-Katana
108-Ninja Katana
109-Gisarme
110-Taros Sword
111-Right of Hope
112-Wooden Panel
113-Sky Orb
114-Cannon
115-Dry Stone
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116-Dynamite
117-Arm of Golem
118-Pegasus Wing
119-Warrior Pride
120-Silver Tank
121-Secret Book
122-Vigor Ball
123-Mithril
124-Life Ring
125-Cotton Balloon
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126-Chirrup Sandals
127-Empty
Selecting an item with no use effect does nothing
shining force 2 configuration mode