>>2630233>toxic and thunder waveprimary status effects(burn/paralysis/poison/frozen/asleep) cannot stack, so I would not put both Thunder Wave and Toxic on one Pokemon. You can stack secondary status effects(infatuation/confusion/curse/etc).
In Pokemon XD Gale of Darkness, Delcatty learns Sweet Kiss upon purification, so in that game she can stack paralysis, infatuation, and confusion at the same time, which is fun.
If you want a memey status build for Delcatty, I would do
Thunder Wave
Attract
Return
Wish
I ran that Delcatty in gen 6 OU on Pokemon Showdown, and it was not completely useless(still not good). You can switch Wish with something else if you can use items, probably another attacking move that is not normal type, so you won't be walled by Ghost types.
For my solo Delcatty build, I usually do
Return
Feint Attack
Wake up slap(introduced in gen 4, so probably not in your game. Dig can be used instead.)
Sing or Work Up
This lets her deal effectively with Rock Steel and Ghost types. Sing has low accuracy, but is necessary for harder Pokemon games if only using Skitty/Delcatty.
>>2630279I am assuming there is a way to obtain trade evos in this game without actually trading. If not, Machoke and Kadabra will not evolve. If you are not taking advantage of Mightyena's Intimidate, then it is probably not worth keeping around either.