After Kim found out that even Ron bought himself clothes in "Kimstyle", he explains that its "Kim for Him". Ironically, Ron's mission outfit is already the same as Kim's, only without the exposed belly, and his cargo pants are more blueish, whereas Kim's are green.
When Shego is sitting on the beach with her legs crossed, she has the wrong feet on the wrong legs (her left foot is on her right leg, and vice versa).
When Kim jumps into the truck, the screen turns to Drakken and you see Kim and Ron in the rearview mirror. As Drakken talks they look scared out of their minds, but when the screen turns back to them, Kim has already started fighting.
If Shego really hated Kim, why would she be reading a magazine about Kim style clothing?
The lemonade on the Bonnie clones turns green a split second before they're sprayed with the soda.
When Kim hugs Bonnie ("Bonnie! It's you! No one else would insult me like that!"), Monique's collar flaps are colored yellow.
How could the Bonnie clone get the picture of Kim if she was behind glass? Drakken had the picture!
Ron's bag with his Kim for Him outfit has Club Banana on the outside of it. But in many other episodes, Kim is the one who shops at Club Banana, and he is a Smarty Mart shopper.
Almost all clones in this chapter were dressed but naked they should be created.
Why would Ron buy his own "Kim style" outfit when he already has nearly identical mission clothes?
When Drakken says DNA, his mouth stays open
Ron was covered in all goo, but when Drakken entered the Taco Restaurant, he was all clean
When at Bueno Nacho, we see Rufus naked as normal, but when Ron says, "Actually, Rufus..." he is suddenly dressed like Kim.
There are a lot of re-used animation scenes in this, particularly the multiple times that Drakken puts a strand on DNA in the cloning machine.
When Drakken puts any DNA in the machine, it's suddenly ginger like Kim's hair. Shouldn't Rufus' whiskers be black?