Why do Pros not build ProtoBelt on Annie?

It's because you can't cast abilities until after the dash completes fully. People thought it would be broken on her when it was on the pbe but it ended up not being the case.

I'm not pro but I sure as hell don't build it. If you know how to position and flash at the right times you won't need an extra instance to get in or out. There's items that just offer better stats overall for her.

I assume it is a similar reason why none of them build AP Teemo.

hum.... on annie you what: CDR more damage even more damage. HP a bit of tankiness. and extra mana is nice.

what protobelt has? a bit of CDR a small amount of HP no resistances. more damage based on your current ap.

it's active is nice on Annie, but most of the time you are better off with . why? because you don't need that much the "drop bear" move. you really need the extra CDR and that sweet 100 ap that protobelt does has. also, tibbers can catch some, and they are most like to run away from you. you are better of with others itens.

also, since annie is better of with tons of AP, you don't need protobelt, you just need more AP and CDR, some else is gonna start the fights, you just need to drop the bear on the CCed enemy. so the best build ends ups being something like: but since it's solo-q maybe something like: give you a all terrain solution.

in other's words: high rank annie players expect somebody else to do the engage, so they focuses on doing damage.

So

(or if you run CDR Blues)

is bad?

The extra engage range is so good though (and its up more often than Flash). Plus it can be fired off for extra damage/dashing.