Sigh. No, Delcatty IS NOT good. It is the worst fully evolved Poke in the game. Its stats are comparable to Elekid and Magby, which are first evolutions of two-stage Pokes. Its stats are lower than Beautifly, Butterfree, Dustox, and the other crappy fully evolved three-stage Pokes. There is no question here. It cannot hit anything and it cannot take hits either. Plus, being Normal-type it has no advantages against over any other type and is only immune to Ghost Pokes. It truly is the most pathetically weak evo in the game.
You claim that your Delcatty is good, but that is because it is Lv80, not because it is actually good. If a Lv80 piece of crap is battling against Lv40-50 Pokes controlled by the pathetic AI, that piece of crap should win. If that Lv80 Delcatty were to battle against another Lv80 Poke, it would lose and lose badly.
Again, if you want to use that worthless Poke then that is your choice. Just don't try to claim that it is good because it definitely is not. You win battles with it by cheating and battling against AI that is geared to allow a six-year to beat it, NOT because it is in any way strong.