|Strengths and weaknesses|
| Wall Staples|
|Experience and money yields|
|Osohe Castle basement|
The Oh-So-Snake is the final boss of Chapter 2 in Mother 3. It is fought in the water channels below Osohe Castle by Duster, Kumatora and Wess after they retrieve the Egg of Light from the castle's top. The Oh-So-Snake can attack the party by diving into the water and creating a giant wave; though this attack will make the boss vulnerable for a few turns.
|Use a biting attack||Causes mid-to-high level damage to one party member|
|Make lots of bubbles||No effect|
|Coil around someone||Immobilizes one party member|
|Dive into the water and cause a giant wave||Deals high-level damage to all party members|
While fighting the Oh-So-Snake, the player must make sure to keep their party members at medium health to avoid being wiped by the giant wave attack; Duster can try to stop the boss by using his Wall Staples while Kumatora uses PK Thunder.
Battle Memory description
"An enormous snake that rules the Osohe Castle basement. Disturb its sleep and it will tidal wave you goodbye."
- Oh-So-Snake's Japanese name is a pun on オソヘ Osohe, and ヘビ hebi, meaning "snake".