Probability Tables
The tables related to magic key generation are relatively simple. There are two important structures to take note of:
| 182969 | Chances of prefix generation. |
| 182a09 | Chances of suffix generation. |
The current level of the first monster in your team is taken into account. More specifically level/10. If you already have a key with the same suffix a new key is generated up to 20 times before the game gives you the key. It will never allow a full duplicate of prefix and suffix. The prefixes (or suffixes) are compared, in order, to a random number chosen between 0x0 and 0x64. If the number assigned to the prefix/suffix is higher than the random number, that prefix/suffix is used in the generation process.
Effectively this means that the prefixes/suffixes must have ascending values in order for this to work properly. The actual chance a prefix/suffix will be chosen can be determined by how much space there is between its own assigned value and the value immediately before it.
For example 0x14, 0x28, 0x37 at the beginning of a list would translate to a 20% chance of the first key (20-0), 20% chance of the second key (40-20), and a 15% chance of the third key (55-40). Technically that first one would be 21% because of the way the calculation works. (The last entry in a list is technically 1% less likely than it would be too.)
For convenience here are the vanilla percentages as determined by DWM2_DD. They are in decimal:
| Lvl, round down | 01 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 |
|---|---|---|---|---|---|---|---|---|---|---|
| Ylw | 21 | 16 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 00 |
| Plain | 20 |
15 |
11 | 00 | 00 | 00 | 00 | 00 | 00 | 00 |
| Green | 15 | 15 | 15 | 16 | 06 | 04 | 04 | 00 | 00 | 00 |
| Blue | 15 | 15 | 15 | 15 | 10 | 05 | 05 | 03 | 00 | 00 |
| First | 10 | 15 | 15 | 15 | 10 | 10 | 10 | 03 | 04 | 00 |
| Red | 10 | 10 | 15 | 15 | 15 | 15 | 10 | 10 | 05 | 06 |
| White | 10 | 05 | 10 | 15 | 15 | 15 | 10 | 10 | 05 | 05 |
| Quiet | 04 | 05 | 10 | 10 | 15 | 20 | 15 | 15 | 05 | 05 |
| Black | 00 | 04 | 05 | 05 | 10 | 10 | 15 | 15 | 15 | 10 |
| Gaudy | 00 | 00 | 04 | 05 | 10 | 10 | 15 | 15 | 15 | 10 |
| Silvr | 00 | 00 | 00 | 04 | 05 | 05 | 15 | 10 | 15 | 10 |
| Dream | 00 | 00 | 00 | 00 | 04 | 05 | 05 | 10 | 10 | 10 |
| Misty | 00 | 00 | 00 | 00 | 00 | 01 | 05 | 05 | 10 | 15 |
| Secrt | 00 | 00 | 00 | 00 | 00 | 00 | 01 | 03 | 10 | 15 |
| Shiny | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 01 | 05 | 10 |
| Last | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 01 | 04 |
| Lvl, round down | 01 | 30 | 50 | 80 | 90 |
|---|---|---|---|---|---|
| Slime | 2 | 2 | 7 | 7 | 7 |
| Draco | 0 | 1 | 6 | 6 | 6 |
| Beast | 1 | 1 | 6 | 6 | 6 |
| Bird | 1 | 1 | 6 | 6 | 5 |
| Tree | 1 | 1 | 6 | 6 | 5 |
| Bug | 1 | 1 | 5 | 5 | 5 |
| Devil | 0 | 1 | 5 | 5 | 5 |
| Death | 0 | 1 | 5 | 5 | 5 |
| Thing | 1 | 1 | 5 | 5 | 5 |
| Water | 1 | 1 | 5 | 5 | 5 |
| Lord | 0 | 0 | 0 | 3 | 5 |
| Cave | 2 | 2 | 1 | 1 | 1 |
| Isle | 3 | 2 | 1 | 0 | 0 |
| Torch | 3 | 2 | 1 | 1 | 1 |
| Gardn | 3 | 2 | 1 | 1 | 1 |
| Pit | 0 | 2 | 1 | 2 | 2 |
| Bsmt | 0 | 2 | 1 | 2 | 1 |
| Jail | 0 | 2 | 1 | 1 | 1 |
| Magma | 3 | 2 | 1 | 0 | 0 |
| Sea | 3 | 2 | 1 | 0 | 0 |
| Field | 3 | 2 | 1 | 0 | 0 |
| Tower | 3 | 2 | 1 | 0 | 0 |
| Mine | 3 | 2 | 1 | 1 | 1 |
| Hill | 3 | 2 | 1 | 0 | 0 |
| Cstle | 0 | 2 | 1 | 3 | 3 |
| Mound | 2 | 2 | 1 | 1 | 1 |
| Desrt | 3 | 2 | 1 | 0 | 0 |
| Lake | 3 | 2 | 1 | 0 | 0 |
| Jungl | 3 | 2 | 1 | 1 | 1 |
| Haven | 0 | 2 | 1 | 3 | 3 |
| Grass | 3 | 2 | 1 | 0 | 0 |
| Forst | 3 | 2 | 1 | 0 | 0 |
| Grave | 0 | 2 | 1 | 2 | 2 |
| Crag | 3 | 2 | 1 | 0 | 0 |
| Shore | 3 | 2 | 1 | 1 | 1 |
| Log | 3 | 2 | 1 | 1 | 1 |
| Sky | 3 | 2 | 1 | 1 | 1 |
| Mtn | 3 | 2 | 1 | 0 | 0 |
| View | 0 | 2 | 1 | 1 | 1 |
| Cliff | 3 | 2 | 1 | 1 | 1 |
| Islet | 3 | 2 | 1 | 1 | 1 |
| Land | 3 | 2 | 1 | 0 | 0 |
| Grove | 3 | 2 | 1 | 1 | 1 |
| Swamp | 3 | 2 | 1 | 0 | 0 |
| Manor | 0 | 2 | 1 | 1 | 1 |
| Depth | 0 | 2 | 1 | 2 | 2 |
| Hole | 0 | 2 | 1 | 1 | 1 |
| Tomb | 2 | 2 | 1 | 2 | 2 |
| Soil | 2 | 2 | 1 | 1 | 1 |
| Pond | 3 | 2 | 1 | 0 | 0 |
| Hell | 0 | 2 | 1 | 3 | 3 |
| Moon | 2 | 2 | 1 | 2 | 2 |
| Ocean | 2 | 2 | 1 | 2 | 2 |
| Gulch | 3 | 2 | 1 | 0 | 0 |
| River | 2 | 2 | 1 | 0 | 0 |
| Star | 0 | 1 | 0 | 1 | 1 |
Note that duplicate columns are not shown in the above table but the suffix structure is still based on multiples of 10 just like the prefix structure.