A snake that can also act as a rope. Red Rope Snakes are valuable.
The Rope Snake DX is an item in Mother 3 that is obtained after a character leaves the Debug Room by any means except when getting killed by the Firefly. This is mostly likely given to the player so that areas that require the Rope Snake's use are accessible. The player will receive the Rope Snake DX even if the Rope Snake is already present in the player's key item inventory. It is unknown if there are any differences between the Rope Snake and the Rope Snake DX besides the description.