You don't need a spirit guide to bend. Just stretch regularly to avoid injuring yourself.

JK! I've been waiting years to use that one.

If you mean bending like Last Airbender style control over the elements in your dreams, then that is very much possible. Meeting guides is possible as well. (In fact, I do both of these things regularly.) There was a thread detailing the techniques from the show and how to utilize them in dreams, but I can't seem to find it ATM. Though most dreamers find applying the philosophies and motions of the four elements to their bending helps. (Airbending is about circular motions to create a vortex of air and involves being light on your feet and mobile. Waterbending is about fluid motions, like Tai-Chi and is primarialy about re-direction. Earthbending is blunt. You have solid stances and you have to be stubborn and strong like a mountain to move the earth. Firbending is passionate and aggressive, and you utilize circular blocks to dissipate fire.)

As for meeting dream/spirit guides. I wrote an article on this that can be found here.

All you need to know about Dream Guides - Lucid Dreaming - Dream Views

Also, I can see that this is your first post. Welcome to Dreamviews.

This post really does not belong in ED. Can a mod plz move this to Dream Control or another thread?