Cross breeding isn't evolution. Hybrids between similar species in a genus are always sterile. Mules, ligers, sheep-goats etc. are sterile. Evolution has a hard time coming about through true mutations anyway. Much of what we till now have called mutations are being discovered to be thrown switches, information already present in the gene. As well, our growing understanding of epigenetic factors within the cell itself, is causing the traditional definition of evolution to be rewritten, not strengthened. Uncommon Dissent by William Dembski addresses this in deep detail.
Actually, not all hybrids are sterile. Coyote/wolf hybrids, for example, can reproduce. Animal hybrids probably couldn't lead to evolution, though, since animals by far prefer mates from their own species. On the other hand, since plant reproduction is less discriminating (make a ton of pollen and hope for the best, basically), interspecies plant hybrids often occur in nature and can sometimes lead to new species.
However its practically impossible for hybrids(animal) to become their own species: they're so rare that even if one occured in nature it is very unlikely for one to actually reproduce with another of its kind, at the most it would help the non hybrid species's genetic diversity
No matter how many mutations, it's still a lizard. Malaria is still malaria, and a virus is still a virus, no matter how many thousands of trillions of generations of viruses and malaria have bred in humans throughout the ages; they're still the same basic organism. Beyond this, the mutation always presents a loss of information in the organism, so that, in the long run, mutation is deleted again by the majority population. We have different species, but "intermediate" species always take a complete form unto themselves. If I saw more evidence of evolution, I would believe it. I have 11 years of university with honors, and there are still too many questions evolutionists leave unanswered. Most folks I meet adhere to evolution because they want to put God on the defense about the harm He allows us to commit, so that we can continue to do the things we blame Him for allowing in the first place. Read Bones of Contention by Marvin Lubenow.
But new information does come about through mutations created by random copying errors in DNA. Most of the time these mutations don't work out (hence the blue lizard) but every so often you get a mistake that turns out to be helpful (the green lizard).
I believe the word you are looking for is adaptation. It's not evolution. It's a species that adapts to the environment around it. The better adapted, the better chance of survival.
Do you have proof AGAINST evolution?