Wonder Mail Generator
Client Pokémon & message variant
Which flavor text to show, 0–255 for this mission. Doesn't change the mission itself.
Decode a Wonder Mail password
How Wonder Mail works
Wonder Mail passwords aren't really 24 characters of text; they're 93 bits of packed binary, reshuffled into 24 five-bit codes and prefixed with a checksum byte so the game can detect typos. Each mission characteristic below claims a fixed slice of those bits:
- Mission type (3 bits): Help me / Find someone / Escort / Find item / Deliver item. Determines which other fields apply: only Find someone and Escort need a target Pokémon; only Find item and Deliver item need an item.
- Dungeon and floor (7 bits each): where the mission happens. Floor also drives the difficulty rating (E through S, then ), which sets the money reward's amount and whether a Friend Area reward is allowed at all.
- Client and target Pokémon (9 bits each): who's asking, and (for Find someone/Escort) who's being rescued. Purely flavor, doesn't affect the reward or difficulty.
- Item (8 bits): the find/deliver objective, or the item half of a reward.
- Reward (4 bits, plus 6 more if it's a Friend Area): money only, money plus an item, an item plus a mystery bonus, or a Friend Area. Friend Area needs at least D difficulty; the game format has no way to combine it with money or an item.
- Message variant (24 bits): picks which line of flavor text is shown. This is the only field changes the password without changing the mission at all.
Icons are Nintendo/Spike Chunsoft’s in-game art, sourced from individual item pages on the Mystery Dungeon Wiki, used here under CC BY-NC-SA. This codec is a standalone open-source library.