So I've heard that theres a secret zone in area 7 of the Deserted Islands where you fight Deviljho at some point, is there any way to get there without being on a Deviljho quest?

I don't think so, at least, I've never heard such a thing. If it existed it should be more widely reported.

Errr what are u talking about?

If u want to fight 2 jho on desert island u'll have to pick 25 jaggi advanced quest and wait in area 5 wait 4-5 min and 1 jho will appear , kill him and as soon his body disappears another one will pop up

I think you are talking about the "felyne explorer" skill. it works on any high rank quest and you get a couple of awesome ores and bugs there.

but if your not talking about felyne explorer, then i have absolutly no clue.

Look it up on the Mh wiki, there's a spot right n ext to the entrance that's a secret area in area 7 of the Deserted Island, I'm gonna go check it out and see if it is actually a felyne explorer skill thing.

LOOOOOOL Eat for explorer and give it a try

You get on a ledge in Area 7 with a bug and one ore deposit in Deserted Island w/ Explorer, idk on bugs, but the ores are Carbalite w/ Bloodrun Jewels usually.

and it needs to be a hi rank non paw pass quest for explorer to work

Lets clear this up for you.

You cannot care about this yet, you aren't a High Rank Player. Secret areas are special gathering spots full of special materials, thats what I think anyway. You can only get to these places in High Rank quests, excludes Harvest Tours.

Only way to get into these spots even then is when you start up there by a 3% chance of landing there. No chance you getting there from somewhere else, or coming back. Otherwise to gurantee starting in these areas is getting the Food skill "Felyne Explorer", for High Rank only again.

Being D. Island secret area is a sheer cliff with space inadequate for even G. Jaggi fights, you certainly don't fight Deviljho up there.

If it helps, I'll add a few facts I learnt going to High Rank.

1. You don't start at camp anymore. Most the time you start at a random spot on the map. Chance of still landing at camp, and smaller chance of Secret Areas. TIP, always bring Farcasters, Pickaxes and Bug nets, you'll need them.

2. In D. Island you don't fight Deviljho in the Secret Area, but I hear in Tundra the Deviljho smashes the stack of branches in area 1, leading to a Secret Area. I think its the Jho's lair. There, you can get special bones.