Telekinesis. Invisible weaponry. Just to name a few. And they'll have the advantage of flight over us if we're left powerless. [As for those other questions...]

I haven't had to fight them without the use of my power yet, but it's very possible they will show up here. They have before. [He points his index finger out at Krillin.] So don't get complacent like a lot of these other oafs here, got it?