Just this morning, my Treecko’s skin started to peel. Do reptilian-like pokemon shed like their animal counterparts, or is there a condition I need to be aware of?

Yes, if your treecko is not shedding excessively (you will know if it’s flaking off in small bits, rather than peeling off seemingly all at once), this is completely normal and absolutely comparable to the shedding of its animal “cousin.” If the skin is discolored and flaking, rather than peeling or shedding, then the atmosphere in its habitat may be too dry for your treecko’s needs, or your treecko may have contracted pokérus. It would be a wise idea—only if your treecko’s skin is discolored and flaking—to take it to the pokémon center.

I emphasize that you should only take it to the pokémon center if its skin is discolored, of course, because if you are dealing with a case of ordinary shedding, then your treecko will very likely be extremely defensive at this time. Shedding is a vulnerable period, not only because treecko can’t defend themselves as they shed but also because their natural defenses will be a little weaker as their new skin takes time to harden and adapt. You’re actually rather lucky to be watching your treecko shed (if that is indeed the case); most treecko prefer hiding themselves away in warm, moist corners of their homes, where they won’t be bothered. It’s rare, in other words, for a treecko owner to have the chance to watch their pokémon shed, and it’s a sure sign that your treecko trusts you fully.