Basically, I had a Nidorino in the PC, and his nickname somehow changed to have a really long space and the letters "LFAF" at the end of it. I've heard that some glitch Pokemon have really long names, never really messed around with them myself, but I think they have this same effect, I would have to press A/B a lot on any screen his name was on, like I had to scroll through it (even if his name wasn't actually in the text box at the bottom). (So you can probably skip the next paragraph if you know the effects of long names haha)
I first noticed this when I was going to withdraw a Pokemon from the PC, and when scrolling through the Pokemon, it would stop scrolling whenever the Nidorino's name scrolled onto the screen, until I pressed A/B. His name looked normal in the PC, but after pressing A/B it said just "LFAF" in the text box at the bottom, and when withdrawing him it said "(long space taking up a few lines) LFAF was taken out." Looking at his stats would give a blank white screen until I pressed A/B, and the little text that says "IDNo/" and "OT/" was missing on his stats screen. Looking at the party screen when he was in it would also give a blank white screen at first, and when I tried battling with him, I would have to constantly press A/B, sometimes 3 or 4 times in a row, before anything would happen. Going to the name rater and changing his name fixed all of this of course.
Soooo any ideas how this could happen to a normal non-glitch Pokemon, when I hadn't even used any glitches or seen any glitch Pokemon in the game? I had about 4 PC boxes full of Pokemon and this was the only one it happened to, so far. The only thing abnormal about my Pokemon really is that they know moves that they normally shouldn't, due to the randomizer (not glitch moves or anything). The last move on the Nidorino's move list was Razor Leaf, so I wondered if maybe the "LFAF" came from the "LEAF". Or could it be something to do with other Pokemon in that box? I had just caught a Gastly and Graveler and deposited a Seaking in there before I noticed this glitch. I even had that Nidorino in my party before and his name was perfectly normal then. So yeah, what's going on here?