I don't know what the red means for him, but this guy is a hacker.
Do not trust him.
As well as that, last year we had a deal. I was supposed to transfer 6 of his pokemon to another of his game and my reward would have been 2 pokes.
Obviously, I didn't get anything and the pokemon that I have transferred were hacks!
I am not warning you babypanda because I have something personal with him, but just in case you finalise a trade with him, to know with whom you are dealing!