>>564264863. Cute Charm - Prevents the opponent from switching out if they are infatuated
This helps solve Attracts biggest problem, opponents can just switch out and the effect completely disappears. A Cute Charm Delcatty can now effectively use Attract on a smart opponent. I don't think this is too OP because, unlike Shadow Tag it at least requires one turn of set up.
Normalize has a lot of potential and can be changed in a lot of ways. Here is one way
Normalize - Moves used by this Pokemon are all turned into Normal-type moves and they ignore the resistances and immunities of other Pokemon.
This prevents Normalize Delcatty from being walled out by every ghost type. This ability would be a lot stronger on a Pokemon with a high attack or special attack, but on Delcatty it is pretty tame. My main problem is that it makes one problem I have with Normalize worse. It gives Delcatty a very one-dimensional playstyle. So I have another idea for a change.
Normalize - This Pokemon has the option of changing a non-Normal type move into a Normal-type move
I'll explain, so imagine you are clicking the fight button and then you click 1 of your Pokemons moves. With this ability you get a third pop-up window right before you confirm the attack, asking if you want to Normalize this attack. So I chose to use Sucker Punch and then chose to Normalize Sucker Punch, it would be a normal attack, but if I chose not to Normalize it, it would be a dark attack. This more complicated change still solves the coverage issue of Normalize while also giving Delcatty a more engaging play style. I favor the second change but either work.
For Wonder Skin, I would just change it so status moves have a 100% chance of missing instead of 50%.