I could replace them (Dragonite and Talonflame, since without their hidden abilities they're not the best they could be) and find better mons if I knew what'd be perfect.
Actually Inner Focus isn't a terrible ability for Dragonite in doubles. Since Fake Out spam is everywhere it can get you some surprise opportunities to really fuck up your opponent. Dragonite will always be either very weak to Fake Out or very strong against it depending on its ability.
My Delcatty's moveset has:
Covet
Feint Attack
Iron Tail
Fake Out
Held Item: Focus Sash (which at my ended streak I stupidly replaced with a Brightpowder and got one-shotted; never again)
So first of all it seems like you know this, but never use Brightpowder. It's an awful item and is a total waste of a slot. Focus Sash, Sitrus Berry, Metal Herb, and even the much-maligned-in-doubles Leftovers are much better options. Same with Quick Claw, just don't waste your time with extremely low-RNG stuff like that.
That moveset seems... Not great. The Fake Out is good, you probably want that for sure. Covet only works if you item is gone, and Iron Tail and Feint Attack are just super weak. Other viable moves (not including egg moves) include:
-Icy Wind (more for the speed drop than the damage, depends on your teammates as to whether this is worth it, but probably preferable over Thunder Wave if you do)
-Helping Hand (amazing in doubles, especially for allies with moves that hit both opponents)
-Heal Bell or Safeguard (kind of niche, but can be a godsend in some situations)
-Toxic (probably too slow for doubles, but at least cripples stall sets that aren't immune to it)
-Assist (only on some VERY specific gimmick teams)
-Charm (not ideal, but a fast way to cripple physical attackers isn't nothing)
-Protect or Substitute (pretty much always a decent option on anything in doubles)
So that being the case I would probably run something like Fake Out, Icy Wind, Helping Hand, Charm. There are almost certainly other Pokemon that can pull off this basic role better, but if you are going to use Delcatty I think that set with a Focus Sash or maybe Sitrus Berry would be non-useless.
Gengar has its mega stone with this moveset:
Shadow Ball
Sludge Bomb (because Sludge Wave kept hitting my partner hard and the A.I. started throwing grass to force me to use it so it dies)
Protect
Destiny Bond (last resort option since Shadow Tag forces them to stay in)
EVs are max Sp. Attk and Speed.
Ikr?
it was worth the 807 eggs :'D
Yeah, that's probably the most standard Gengar set in doubles. That should do a lot of work if you're careful with it.