I didn't actually notice that until you gave me the tip. Yeah, I think Zowayix's explanation is correct. When I tried to check the stats of my trained and non-glitched lvl 96 Blastoise, there is also a noticeable lag. Although the lag is a bit shorter than the glitched ones, it's longer than the non-trained ones. So I think the higher the stat exp, the longer the lag.I noticed that there is a somewhat noticable lag, when I check the maxed out Pokémons' stats on PC. If I have the maxed out Pokémon in my party and I check their stats, there isn't any lag when I check their stats. I wonder why this happens? Can the game actually tell that the maxed out Pokémon are hacked, glitched or something like that?
I don't have the right to answer the question, but I think Gen 1 and Gen 2 games have no way to detect whether the Pokemon is hacked or not (except for the obvious HP DVs). The Pokememory image above seems to tell the same. The later generations obviously have some sort of pattern / algorithm in generating Pokemon data (thus, the birth of RNG manipulation), so hack check sites like Pokecheck are able to detect hacks very accurately.Can the game actually tell that the maxed out Pokémon are hacked, glitched or something like that?