Originally Posted by Fat Otto
I updated a Pokémon at pokecheck, but I got something orange at the nickname:
"Found trash bytes but no associated name. Can be the result of a changed nickname or a combination of different kinds of trashbyte (e.g. evolve after transfer or nickname after evolution)."
what does this mean? Does this mean my pkm is illegal? 0.o got it in a trade
This means that your Pokémon's name changed, but it can't remember what its old name was.
If it's an evolved Pokémon, it's completely legal and can happen normally without hacking. The only other legal possibility is if it has the OT Kuro* or Shiro* and no nickname, which would happen if its OT or nickname got censored by the GTS.
So yes you can probably use it. :D :D :D