Dotted around the region of Oblivia, you will find numerous tablets in a variety of areas. These tablets are blocking doors in the areas and preventing access to the caves. To unlock these doors, you need to complete missions in the past. Complete the missions and the doors will open. While the new areas are never really that in-depth, they do provide the only access to certain Pokémon. These Pokémon can only be found in these areas, but you'll discover them used by Pokémon Nappers at various points in the game. Below is a list of the doors, what mission you need to unlock them, and what is found inside them

Drapion Door

Location: Renbow Island - Rasp Cavern
Mission Unlocked: Forest Temple - Drapion of the Forest Temple

The first door you'll encounter in the game is within Rasp Cavern. This door features a Drapion print and is unlocked after you have defeated Drapion in the past. The tablet will crush and when you go to the Rasp Cavern, it will open and hold the Pokémon; Skuntank

Ranger No. Picture Name Type Field Ability Assist
R-054 Skuntank Poison Slam * 2 Poison

Tangrowth Door

Location: Renbow Island - Ratorato Mountain
Mission Unlocked: Forest Temple - A Pokémon Forest in the Way

The next door you'll encounter in the game is on the side of the path in Ratorato Mountain. This door features a Tangrowth print and is unlocked after you have defeated Tangrowth in the past. The tablet will crush and when you go to the cave in Ratorato Mountain, it will open and hold the Pokémon; Wobbuffet

Ranger No. Picture Name Type Field Ability Assist
R-104 Wobbuffet Psychic Teleport Psychic

Tyranitar Door

Location: Mitonga Island - Daybreak Ruins
Mission Unlocked: Fire Temple - Graveler's Terrible Rocks

The next door you'll encounter in the game is deep within Daybreak Ruins, on the right as you enter one of the big rooms. This door features a Tyranitar print and is unlocked after you have defeated Tyranitar in the past. The tablet will crush and when you go to the doorway in Daybreak Ruins, it will open and hold the Pokémon; Ambipom

Ranger No. Picture Name Type Field Ability Assist
R-089 Ambipom Normal Break * 2 Rock

Abomasnow Door

Location: Hauldera Island - Hauldera Volcano
Mission Unlocked: Ice Temple - Rush Ahead! Don't Look Back!

The next door you'll encounter is within the internal cave of the Faldera Volcano. To the east of the second chamber you'll find the door. To open it, you'll need to beat Abomasnow in the past. The tablet will crush and when you go to the doorway in Faldera Volcano, it will open and hold the Pokémon; Tyranitar

Ranger No. Picture Name Type Field Ability Assist
R-218 Tyranitar Rock Break * 4 Rock

Electivire Door

Location: Sophian Island - Solberas Mountain
Mission Unlocked: Thunder Temple

The next door you'll encounter is outside on the mountainside of Solberas Mountain and you'll find the door to the north-west of the area. To open it, you'll need to beat Electivire in the past. The tablet will crush and when you go to the doorway in the mountain, it will open and hold the Pokémon; Infernape

Ranger No. Picture Name Type Field Ability Assist
R-196 Infernape Fire Flame * 3 Fire

Dusknoir Door

Location: Sophian Island - Oblivia Ruins
Mission Unlocked:

The next door you'll encounter is deep within Oblivia Ruins in the room with the patrolling Claydol and you'll find the door to the south-east of the area. To open it, you'll need to beat Dusknoir in the past. The tablet will crush and when you go to the doorway in the ruins, it will open and hold the Pokémon; Slowking

Ranger No. Picture Name Type Field Ability Assist
R-268 Slowking Psychic Teleport Psychic