Memorial Pillar (Japanese: おもいでのとうMemorial Tower) is a location southeast of the Sevii Islands. Northwest of the area is Five Isle Meadow, while going south leads to a dead end. The area is mostly sea, with two segments of land, north and south of the area. The north segment is a small island with three Trainers and patches of grass. The south segment serves as a grave site to an Onix, nicknamed Tectonix (Japanese: イワキチIwakichi), that was loved immensely by its Trainer.
The player enters the area while surfing from the east and make their way left to the north portion of the Memorial Pillar, or can alternatively continue south on the water until their get to the south portion. The north portion of Memorial Pillar is a long strip of land with patches of tall grass. If the player makes their way down, they will face three Trainers, all being Bird Keepers with two Pokémon each, waiting for battle. There are also three hidden Berries scattered on the ground between patches of grass. There are patches of sandy beaches on the shore of the small island, that leads up to the hilly grass land. If the player travels south on the northern segment, they will reach another entry, where they may surf on the water down to the southern segment.
The south portion of Memorial Pillar is smaller than the northern segment. It serves as a grave site to an Onix, nicknamed Tectonix (Japanese: イワキチ Iwakichi), that was loved immensely by its Trainer. The actual memorial is a large tower-like pillar shaped like an Onix tail made from rock which was how the area got its name. If a player puts a Lemonade (by interacting with the pillar), Tectonix's favorite drink, on its grave, the mourning Trainer will give the player TM42 (Facade) as a thank-you.
The player must start on the sandy beach shore and make their way up the hilly path to the top where the great memorial is located. The player can also make their way down another hilly path on the left to a small beach, where a hidden Big Pearl can be found, and a small area of water to surf. This is a dead end, and the player must retrace their steps to get back to where they began.