Scattered reports from Unova's beaches of Eelektross climbing out of the ocean through their arms to devour hapless amphibious pokemon were once almost universally concluded to be in error. For one, Eelektross are not water pokemon, nor are they even truly able to swim. For another, the caves their descendants call home are at some distance from the ocean, and although wild Eelektross are quite rare as they require sources of thunderstone, Tynamo and Eelektrik rarely exit their caves in the wild even when near the entrance.
Yet both these objections can be answered, and given the frequency and consistency of eyewitness accounts, these sightings should not be dismissed out of hand. Wild Eelektross are indeed extremely rare, and probably follow the behavior patterns of their evolutionary predecessors – but there is a method which lets these pokemon learn to explore the outside world. Eelektross are commonly trained for the Pokemon League, because of their lack of weaknesses and powerful electric attacks, and some of these pokemon are abandoned or outlive their trainers and turn feral.
These Eelektross have little need to return to their caves, and less ability to find the way back, even if they should remember it. Yet Unova is a coastal land, and the ocean, with its abundance of pokemon weak to Eelektross' attacks, is never too far away. As for reports of them swimming and climbing, these are inaccurate, but a simple mistake to make – for Eelektross indeed levitate just above the surface of the water, using their arms to shock and devour any nearby water pokemon. What appears to be climbing onto the land is in truth digging through wet sand, where their prey often digs a hiding spot. Such is the truth behind the often disbelieved tales of monstrous aquatic Eelektross.