I have two brother rockruffs and after discussing evolution with them I found out that one wants to become the midday form and the other midnight. I have done research and discovered that the midday likes to be alone, and the midnight form tends to provoke others into fights. They are well trained, but like typical brothers they tend to get into mild fights, I was just wondering how big of a problem I’m going to have when they evolve.

When it comes to two wild rockruff, the answer to this question would be rather complicated, but luckily, what we have here instead are a pair of tame rockruff. This means that your rockruff grew up feeling safe and secure, under the guidance of a trainer who very clearly cares about them. Thus, even though you may have heard things about either lycanroc’s aggressive nature, those facts are a bit more applicable to wild lycanroc, especially with regards to the midnight form. If you, as a trainer, manage to raise a midnight form lycanroc from its final, more rebellious days as a rockruff, that lycanroc will remember that you did this, so he’ll be more inclined to listen to you when you tell him to stop fighting his brother. (Midday lycanroc are very given to obeying orders from the outset, regardless of who trained them or how they were trained.)

At the same time, I also feel it’s highly important to note the nature of siblings. Speaking from personal experience, when you have two siblings who evolve (or, well, in the case of the example I’m thinking of, grow up) to be two completely different beings with polar opposite personalities, you may think that they would never get along. It’s true that fights are inevitable, as you’re correct in saying these are simply part of the experience of being a sibling. However, if the fights are never truly bitter or violent, then it’s very likely that a sort of undercurrent of familial love exists between them. That is to say, while it’s in the nature of two siblings to fight, it’s also in the nature of two siblings give their left arms for each other. Or in other words, siblings may bicker, but they will very rarely actually want to hurt each other, no matter how tense their relationship with one another may be.

Or to answer your question simply, I doubt those two will be a problem, anonymous. As always, keep close watch on them shortly after evolution and perhaps encourage them to take their fighting outside (just in case), but if I’m correct about their relationship, then the most trouble you may see would be some mild sparring with each other.