sir, i was writed a letter. i was cathced 2 normal type scyther/event/ in a 5 minutes. i searched more than 3 hour . but they coming 2. i fear to ban. because this is not first. i was banned same problem (rotom event.) please master, i'm worried.
Just encountering event Pokémon is not something you get banned for.
Automated Pokémon hunts, such as through botting, is not allowed.
If you're playing normally, and you have the luck of encountering multiple event Pokémon in a short time, then there's nothing wrong with that.