How do you get Mt Travail?

you have to talk to sunflora and get through surrounded sea, then azurill will have a nightmare and you have to go talk to drowzee at mt. travail it has 20F still haven't got through it yet =(

I didnt come across any they may be rare there but berries appear often use those instead

after you (the player) clear the twentieth floor you will meet drowzee

Same way with any others. the only unlimited dungeon is the Zero Isle chain.

19 or 20