Nanab Berry

use it on the rats and pidgeons that always jump around... just to empty them out of the bag

I use them for pidgey and rats etc so they keep still and I don't waste balls on small grinders...and it gets rid of them quickly so I can use the space for something else.

Toss this useless berry

I just throw them away immediately and then wait for something better with the next spin.

Completely useless in my view.

I heard players in Japan use this and Poké Balls to capture Togetic

Nanab is great against pokes that seem to be nervous and not only jump around the field but also tend to jump out of a ball more often than usual. It's not useless - in fact it's better than Razz in the cases above.

Maybe once up on a time, when u meet ur team Bird (that bird will fly brainstorm) or mewtu who gets invisible to switch positions...
:D XD lol