Im using magnzone and I'm maxing out my its speed ev for electro ball so what other ev stat should I max? My picks are sp attack, defense and HP but what should I max?
Electro Ball is a Special attack whose Base Power scales with the user's Speed relative to the opponent, so the optimal choice to maximise damage output with Electro Ball is to max out Speed and Special Attack. Maxing Special Attack will also power up your other special moves. Depending on the format played, you may also want to put some EVs into HP/Defense/Sp.Def to survive certain attacks. However, I wouldn't recommend using Electro Ball on Magnezone because of its low base speed. Electro Ball's base power with a max speed Magnezone will likely be 40, 60 or 80, all of which are straight up inferior to Thunderbolt. Source: https://pokemondb.net/move/electro-ball