Would a spider bite from Vancouver island make you unable to walk?

It's not where the spider is from that matters. What matters is what species the spider is.

A tropical spider could have escaped from a spider farm on the island, for example.

You need to remember what the spider looks like and call emergency services if you believe it was poisonous, then tell them exactly what you remember about the spider. They will need to identify it, confirm if it is dangerous or not then get the right treatment, because different species have different types of venom.

There are 34,000 different species of Spiders all over the world.

If you or someone is having difficulty walking due to a spider bite or other unknown reason, you need to get them medical help right away. If it is not a spider bite, it could be Meningitis B, a damaged spine, etc etc.