Each entry is 0x18 bytes long.

0x00 - 0x01 - Map Data ID

0x02 - Various pieces of data are determined through bitwise. The switches will behave as boolean, as is the nature of binary, as follows:

bit 0 - Stairs direction. If switched on, (1) stairs travel up. Vice versa for 0.
bit 1 - Do enemies evolve? If on, enemies evolve.
bit 2 - Doesn't seem to do anything. E0 and E1 are nowhere to be found at this offset.
bit 3 - Can Pokemon be befriended? If on, you can befriend Pokemon. Only seems active for Sky Ruins and Island of Isolation, levels which you connect with legendary pokemon after you defeat them. You are also immediately spawned in with them, which may be why this bit is active.
bit 4 - Handles resetting the team's level to 5. If on, the team's level it set to 5.
bit 5 - Not sure. This bit is off in level reset dungeons, however.
bit 6 - Decides if the player can change the leader. This bit isn't disabled anywhere.
bit 7 - Unknown

0x03 - ↓

bit 0 - Unknown
bit 1 - Unknown
bit 2 - Unknown
bit 3 - Hunger Meter. If on, your team's belly can deplete, take damage from being hungry and die of hunger. If off, the the meter is still present, but the team's belly won't deplete naturally, but can still be lowered from stepping on Hunger Traps, Sweet Scent and using Alliances. Apples still restore Belly and increase its capacity. If the Pokemon's belly happens to reach 0, the health bar will turn yellow and damage will not be taken every turn, however, HP cannot be restored naturally.
bit 4 - Unknown
bit 5 - Whether the player can restart the dungeon after fainting. This bit is 0 for all dungeons.
bit 6 - Unknown
bit 7 - Unknown

0x04 - Dungeon Name ID (Only works on the dungeon info popup on the map)
0x05 - 0x09 - Unknown
0x0A - 0x0B - Dungeon Sort Key
0x0C - 0x0F - Unknown
0x10 - 0x11 - Map coordinates on the X axis.
0x12 - 0x13 - Map coordinates on the Y axis.
0x14 - Unknown. Always 00.
0x15 - Unknown. Is 01 for dungeon #61 (Lake of Enlightenment) to #206.
0x16 - The amount of items that can be taken. Usually 20 (32 items). If 01, items the party has are sent to the Deposit Box. If 00, all items are lost.
0x17 - Unknown. Doesn't seem to do anything.