Well objectively Ampharos is by far the best electric type in the game if you aren’t using legendaries. Between her stats, move pool, and how early you can get her. There’s also some subjective reasons for me too, she’s one of my favourite Pokémon they’ve ever released. I only usually play Crystal if I’m okay using legendaries for the playthrough and then I’ll hunt for Raiku as early as I can. There’s not many good electric types in Johto unfortunately. The other alternative is getting Kadabra and teaching him thunder punch, but you don’t get STAB and he’s not the most defensive out there. It works but it’s not ideal. You could skip having an electric type on the team altogether but it’s a very valuable type to have. I’m curious what you use instead of Ampharos, if anything.