Game ⇓ | Flavour Text ⇓ |
| Red/Blue | Moves silently and stealthily. Eats the eggs of birds, such as PIDGEY and SPEAROW, whole. |
| Yellow | The older it gets, the longer it grows. At night, it wraps its long body around tree branches to rest. |
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| Gold | It can freely de tach its jaw to swallow large prey whole. It can be come too heavy to move, however. |
| Silver | It always hides in grass. When first born, it has no poison, so its bite is painful, but harmless. |
| Crystal | It flutters the tip of its tongue to seek out the scent of prey, then swallows the prey whole. |
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| Ruby/Sapphire | EKANS curls itself up in a spiral while it rests. Assuming this position allows it to quickly respond to a threat from any direction with a glare from its upraised head. |
| Emerald | An EKANS curls itself up in a spiral while it rests. This position allows it to quickly respond to an enemy from any direction with a threat from its upraised head. |
| FireRed | A very common sight in grassland, etc. It flicks its tongue in and out to sense danger in its surroundings. |
| Leaf Green | Moving silently and stealthily, it eats the eggs of birds, such as PIDGEY and SPEAROW, whole. |
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| Diamond/Pearl | It sneaks through grass without making a sound and strikes unsuspecting prey from behind. |
| Platinum | It sneaks through grass without making a sound and strikes unsuspecting prey from behind. |
| Heart Gold | It can freely detach its jaw to swallow large prey whole. It can become too heavy to move, however. |
| Soul Silver | It always hides in grass. When first born, it has no poison, so its bite is painful, but harmless. |
| Black | It sneaks through grass without making a sound and strikes unsuspecting prey from behind. |
| White | It sneaks through grass without making a sound and strikes unsuspecting prey from behind. |
