So here we have Eta and Zeta. This pair of Plusle and Minun are both incredibly in sync, and because of that, they're an exploration team to be reckoned with. There are differences between the two, but they're subtle enough that only them two tend to pick up on it. (Eta, by the way, is the Plusle, and Zeta the Minun.)
Realized I never uploaded this here! Did this about the same time I was doing stuff with Epsilon and Upsilon, which was... 2012. Wow.