When the respective bosses are beaten in the past missions, the slates will crumble.
about 4.
You have to beat the bosses in different place and they will disappear so I'm told...
In Pokémon Ranger: Guardian Signs, you can fight old bosses by visiting the "Ranger Net" feature. After completing the game, access the Ranger Net from the main menu, where you'll find the option to challenge previous bosses. You can also revisit specific locations on the map where the bosses originally appeared to face them again.
(Mr) Kinkad, Ice, Lavana, Heath and Blake (Wyatt) Hall.
You can find the previous bosses in the capture arena.And for some rare ones, do all the quests. (to get quest-exclusive ones)
The Pokemon on the doors corispond with the bosses you face in the mission into the temples in the past. Once you defeat one of the bosses, go to the door with that Pokemon's picture on it and it will collapse. But the Pokemon behind the door is not the same as the picture, for instance, behind Drapion's door is a Skuntank.
In Pokemon Ranger you need to capture Pokemon all around Fiore, some might hide behind obstacles and some are not, also you can do capture challenges to obtain Pokemon, Use target clearing on a Pokemon that turns into it becomes alive, some might be obtainable after game completion, If you have captured 209 or 212 with ranger net missions you can get Snorlax, the Pokemon with ranger net are "Deoxys, Celebi and Mew". In Pokemon Ranger Shadows of Almia you need to capture Pokemon all around Almia, some might hide behind obstacles and some are not, Use target clearing on a Pokemon that turns into it becomes alive, some might be obtainable after game completion, some might be obtainable after you complete the quests, some might be obtainable underwater, If you have captured 266 or 269 with ranger net missions you can get Regigigas, the Pokemon with ranger net are "Dialga, Palkia and Shaymin". In Pokemon Ranger Tracks of Light you need to capture Pokemon all around Oblivia, some might hide behind obstacles and some are not, Use target clearing on a Pokemon that turns into it becomes alive, some might be obtainable after game completion, some might be obtainable after you complete the quests, some might be obtainable underwater or in the sky, some might be obtainable with ranger signs, some might be obtainable when you use roar, some might be obtainable in the past, some might be in the island of bosses, If you have captured 300 or 305 with ranger net missions you can get Lugia, the Pokemon in ranger net are "Heatran, Shaymin, Giratina, Dialga, Palkia and Arceus".
You get to Spear Pillar on the top of Mt. Coronet, and after defeating some of the Team Galactic Bosses, you can fight and capture Palkia.
there is toxicroak spirittomb lucario heatran cresselia gliscor yanmega rhyperior mamoswiine tangrowth leafeon umbreon glaceon drapion 4 weaviles magmortar electivire infernape torterra empoleon and in the last room there is charizard flygon and salamence!
The Dryad appears once you've beaten one of the bosses.
easy capture every poke assist then capture the bosses