For those of you who really want the job to unlock Labryinth Cave, heres how: Make numerous drinks at Spinda's Cafe and sooner or later, you will unlock Happy Outlook. Travel to Happy Outlook and while your making your way through it, be sure that you defeat at least ONE Togetec. After you have cleared the dungeon, make your way to Spinda's Cafe. There will be a Togetec offering a job to find the Gabite Scale, which you obtain for beating the dungeon. The second you take the job or open it, you will unlock Labryinth Cave. Wether you complete yhe job or not, is up to you.
P.S. I'm so sorry, the job dosen't come with a Wonder Mail S code so this is the only way to unlock :(