Pokémon Liquid Crystal is a fan-made ROM hack based on Pokémon Crystal, and it doesn't introduce any new Pokémon that weren't already in the original games. Elekid was first introduced in Generation II, but it doesn't appear in the wild in any of the Generation II games, including Crystal and Liquid Crystal.
You can, however, obtain an Elekid through other means in Liquid Crystal:
* Trade: You can trade for an Elekid with another player.
* Breeding: You can breed an Elekid by breeding a male Electabuzz with a female Pokémon that can breed (such as a Ditto).
If you're looking for an Elekid in a Pokémon game, you'll need to play a game from Generation IV or later, where it can be found in the wild.