Cool, having more than one person support a suggestion helps right?
Also I thought of some more suggestions.
Be able to view your direct trade pokemon, for some reason you can view your pokemon that are up for trade, but not the ones up for direct trade. I have some direct trades I've lost track of and the only way to find them is to look at every pokemon I have, I try to keep a low amount so there's only 109 but that could still take a while. I could look up my username and look at what direct trades I have up but it only displays about 15 at a time and you can't cancel the trades from there. I'd like a setup like the normal 'My Pokemon Up For Trade' menu that lists the pokemon up for trade and lets you cancel right there.
If you offer a pokemon on a trade, you can't put it up for trade, I'm not sure if this is an error or what but if you offer a pokemon on someone's trade then go to your pokemon and click the 'view details' and scroll down to the trade center link then it doesn't give you the option to take it off the trade center like it would for a pokemon up for trade or direct trade, it just gives the option to put it on the trade center despite already being offered on someone's trade (which is a bit confusing if you have two mystic zapdos and aren't sure which one you already offered on a trade and which one you want to put up for trade). If it's not an error I'd like to make a suggestion to change it, if it is an error then I'm too lazy to properly report it and I'll just ignore it.
Be able to view more details on a trade, this one may means a few different things. If someone offers on a trade I'd like to see their name, if they offer a weedle on my trade then I want to know if they are a bit of a newbie and they don't have much to offer or if they're a troll with a team of shadow pokemon out for everyone to see, it would make a bit of a difference in whether I accept their offer or not. There are also times when I'd like to put a pokemon up for trade for my sister or a friend and we have to go through a bunch of extra steps to make sure it goes to the person I want it to go. Also I'd like to be able to see the name of a pokemon being traded (if it has one) and whether or not it's holding an item. The name doesn't make a huge difference since I could change it easily but I like to give pokemon fun names (every mystic omanyte I catch is named Lord Helix before I put it up for trade, as a 'twitch plays pokemon' reference). I like to sometimes attach an item I'm not using to a pokemon before I trade it, I don't know why I had all those megastones but someone may be pleasantly surprised if they ever noticed when I attach them to pokemon.
Either fix broken TMs or remove them from the shop, this may go under the "Fix all move problems" someone suggested but this isn't about recoil and charge time so much as simply wasting money. I bought the TM for attract in the shop and it just doesn't seem to work, I guess due to lack of genders or something. I don't know if other TMs have this problem of simply not working due to the way this game is designed but if someone could find out which ones are broken and remove them people can save their money for stuff that does work then that would be cool. Maybe you could replace the broken TMs with other moves. Personally I like fire/thunder/ice punch, I feel it gives certain fighting types better versatility to have a mix of attacks. Machoke can learn flamethrower and fire blast, but that's special attack, fire punch tends to be better suited for him being normal attack. Although if you implement breeding and/or egg moves I can use that.
In fact I'm adding my vote to the 'egg moves/breeding' suggestion that someone made.
Have a way to stop traded pokemon from evolving, personally I like machoke and haunter better than their evolved forms, who doesn't love disembodied hands and unexplained red stripes? But I can't trade for them without them evolving. You have complete control over whether or not a pokemon evolves in every way except when it comes to trade evolution.
Mini Games, just some small way to earn money when farming blisseys gets dull. Perhaps something like the casino or contests you see in some games, or if I can be unrealistic for a moment then the pokeathlon but I'm not getting my hopes up.
Friendship, speaking of broken TMs I'm pretty sure return and frustration only gain power through friendship and... Negative Friendship? Hate? I don't know if there is a specific word for it in the games but if your pokemon dies all the time they tend to not like you all that much. Also there are pokemon that evolve though friendship, like eevee to umbreon. I think in pokemon x and y pokemon with high friendship would get critical hits more frequently.
'Greninja is so in tune with your wishes that it landed a critical hit!' Says the game every time you see a pokemon you actually wanted to catch.