Well, not with the birds and definately not the starters.
In terms of strength, the only Pokemon that should really have 4th evos are Butterfree, Beedrill, Beautifly and Dustox. I can understand why people think they should not evolve, but this is Pokemon, not real life. I would like them to get evos because Im fed up of people saying that 4th evos dont exist. We have no PROOF yet of this, so I can still hope.
The thread starter flaming everyone? Well, if he did not do that, then more people would have posted and said that a 4th evo is a ridiculous idea. Now that hes said that, at least anyone who decides that they will be able to say for sure that a 4th evo will never exist, can now be known as an imaginative person.