Lost in Mythos

The Shell Lodge Squad takes a trip with the Mane 6, Discord, the Cutie Mark Crusaders, and the Celestial family to the mythical creature sanctuary of Mythos, after hearing from the High Council that the Mythos Black Market dealings have gotten worse, and creatures are beginning to be threatened. So it is their mission to find their hideout and stop them. But on the way, they wind up getting separated from each other. Discord, Fluttershy, Rainbow Dash, and Pinkie wind up with part of the Shell Lodgers, the CMCs, Applejack and Rarity wind up with another group, and Celestia, Luna, and Twilight wind up with the last group. Keeping in their guts the knowledge that being stranded in Mythos is dangerous, each of the 3 groups need to find a way back to each other, and at the same time, stop the Black Market from making anymore smuggles. Little do they know is that the Villain League is involved in the newest black market deal for some of the rarest mythological creatures for their power. Will the heroes get through everything Mythos can throw at them, and stop the Black Market before the sale is made?