Are all intelligent beings bi-pedal?

Uhm no !

The majority of intelligent beings on Earth aren't even bi pedal. think before you write.

what about crows? they are very smart and the can create tools.

A Murder of Crows

Octopuses are remarkably intelligent, and probably the most 'alien' (compared to us, as humans) form of intelligence we know, and they're far from bipedal.

Maybe you did not ask the correct question. You may be slightly confused in your own mind here. To think that life can only be intelligent if it is bi-pedal is perhaps coming from the wrong angle. Perhaps what you really want to know is if only bi-pedal beings can progress to develop an advanced civilization through technological means ?
Dolphins for example are reasonably intelligent by our understanding and rating of intelligence but they have no limbs at all. They are unlikely though to progress in an evolutionary sense because they don't have the ability to be able to further there own understanding of the nature of life, their own world or of the planet they live on. Only if they were to develop limbs and interact physically with the world around them could they progress. If they had limbs now and the dexterity to manipulate what's around them then i dare say that they are already intelligent enough to build a society, although i doubt they would get close to ours for quite some time.
So basically the core intelligence may be there in many animals but their problem is that they do not have the dexterity to further their intelligence.

originally posted by: AdmireTheDistance
Octopuses are remarkably intelligent, and probably the most 'alien' (compared to us, as humans) form of intelligence we know, and they're far from bipedal.

I was about to call out the octopus but you got it first


Yup these guys look alien enough and could be our replacement if they ever become landlubbers.

Cephalopods are quite intelligent.

Edit: NM. Just looked at the last post.