Red +4: Its hard shell repels any kind of attack. It is vulnerable only when its shell is open.
Yellow +2: The shell can withstand any attack. However, when it is open, the tender body is exposed.
Gold: It swims facing backward by open ing and closing its two-piece shell. It is surprisingly fast.
Silver / SoulSilver: Grains of sand trapped in its shells mix with its body fluids to form beautiful pearls.
Crystal / Y: Clamping on to an opponent reveals its vulnerable parts, so it uses this move only as a last resort.
Ruby / Sapphire: At night, this POKéMON uses its broad tongue to burrow a hole in the seafloor sand and then sleep in it. While it is sleeping, SHELLDER closes its shell, but leaves its tongue hanging out.
Emerald: At night, it burrows a hole in the seafloor with its broad tongue to make a place to sleep. While asleep, it closes its shell, but leaves its tongue hanging out.
FireRed: It is encased in a shell that is harder than diamond. Inside, however, it is surprisingly tender.
Diamond +6: It swims backward by opening and closing its two shells. Its large tongue is always kept hanging out.
HeartGold / Sword: It swims facing backward by opening and closing its two-piece shell. It is surprisingly fast.
Omega Ruby / Alpha Sapphire: At night, this Pokémon uses its broad tongue to burrow a hole in the seafloor sand and then sleep in it. While it is sleeping, Shellder closes its shell, but leaves its tongue hanging out.
Sun: The hardness of its shell surpasses the hardness of a diamond. In days gone by, people used the shells to make shields.
Moon: This Pokémon’s tongue is always hanging out. It uses its tongue with great dexterity to dig up sand from the seabed in its search for food.
Ultra Sun: The sand that accumulates inside its shell eventually becomes a pearl. But the pearl gets in the way, so it spits it out and discards it.
Ultra Moon: Even when its shell is closed, its tongue still hangs out. If you give its tongue a good yank, the shock will cause Shellder to open its shell.
