Magnemite

Lock-on: During your next turn, treat any tails flipped when using Magnemite's Electric Bolt attack as if they were heads. (Benching or evolving either Pokémon ends this effect.) | Electric Bolt (50): Flip 2 coins. If both are heads, the Defending Pokémon is now Paralyzed. If either of them is tails, this attack does nothing (not even damage).