I couple of things I've noted (many of which have already been mentioned by other members
1.) I'm thinking that this "Prime" business is a way for Chris to have divergent realities in the Sonichu franchise. It allows him to backpedal on his less than proud moments (ie, Rosechu pegging Sonichu with her duck, Asperchu, different apologies he's been forced to issue). It's basically him getting his cake and eating it, too. However, I wonder where the "Prime" designator came from. Two thoughts: In the J.J. Abrahams "Star Trek" reboot films, the Spock played by Leonard Nimoy is referred to as "Spock Prime", designating that he's the original Spock. This wouldn't have been the first time Chris has lifted something from Star Trek (Captain's Log's, for example) but I honestly don't think that's where he got it from. He may have gotten it from the current iteration of Transformer cartoons, which is called "Transformers Prime."
Of course, unless you're privy to Chris's thought process, there's no way you could know for certain. This is a common display of autism.
2.) In Chris's mind, copying DNA can be a rushed process, where things like "allergies" are easily overlooked. Unfortunately, genetic code doesn't have parts that "stick out" more than others, and are thus more important; either you copy the entire shebang, or you're stuck with an incomplete clone that will probably fail to even live. I had always been willing to overlook the "cherry cola" aspect of Blake's birth, chalking it up as a cartoonish explanation for his appearance--but it turns out that Chris was pretty serious about it.
3.) As others have mentioned, it's pretty much impossible to be allergic to just pickles--you'd have to be allergic to one of the ingredients that make a pickle, like cucumbers, or dill, or vinegar. In fact, "pickle" itself is colloquially assigned to pickled cucumbers--at least in the US--but actually refers to a process by which a wide number of foods can be preserved. Pickled sausages, pig's feet, plums, cabbage, and potatoes are all popular in Europe and Asia. Given that the original Tomgirl pictures showed Chris with sliced cucumbers over his eyes, he probably thinks that "pickles" are a different vegetable from cucumbers.
4.) I wonder if Chris's hatred of pickles extends to sweet pickles (like bread and butter, or hot dog relish) because those are yummy and you'd have to be a very strange person to not appreciate a good sweet gherkin.
5.) "So there." We've seen this pop up in a lot of Chris's recent writing. He seems to have a history of using similar conclusions, possibly because he's run out of ideas and does't know how else to conclude a thought (see the "well, that's it for the essay" conclusion from the leaked school papers.) However, it also be a defense mechanism, a way to attempt to cut off further conversation about a subject that he realizes that he hasn't fully thought out.
6.) "Lesbian Tomgirl Tranny Crossdresser." I find this indicative of Chris's search for a firm adult identity. Most adults would only settle for one label, but Chris is still trying to differentiate himself from his mother in a post-Bob era. So if one label is good, four must be better. I wouldn't be surprised to see this self-identity gain more titles in future updates.
7.) This also means that Chris is identifying more and more with Robbie instead of Sonichu. I find this particularly interesting--Chris, in many ways, regards Sonichu and Rosechu as his "perfect" creations, and as such, has not played with their sexual identities so he can maintain that same ideal and perfection that he established back in the year 2000. This may indicate that Chris feels a certain amount of guilt about tomgirlism and its affect on Barb, due to him projecting that aspect of his life onto secondary characters. It's also incredibly telling is that Chris has been mum on Sonichu and Rosechu's reaction to ALL of their children adopting alternate lifestyles.