Scizor can be obtained at level 1. Just get level 1 Scyther and trade it holding a Metal Coat.
That is just one example. What are the rest?
If there were any events that gave out fully-evolved level 1 Pokemon, put that too.
There are many Pokemon that can evolve at lv.1
This is the list :)
I think these are all the Pokemon although I might have skipped a few but I doubt that