How do you defeat brainiac?

Nobody, all you do now is do missions and get new friends

Electric/Fighting type moves

It is a science show where they conduct unusual experiments such as seeing how deep down in a pool you can get whilst breathing through a snorkelit's also a very smart person.

depends on what you are trying to defeat

psycic Pokemon are weak against ghost type moves bug type moves and dark type moves, you can use ghost, dark and bug moves to deal quite alot of damage