1. I get way too many Froakie and have numerous 5IVs. 6IV wouldn't take long.
2. I have a Giga Drain Bulbasaur from WT. I have to recall whether I have any with the hidden ability. Getting a 5IV of that is no problem either way, and Dittoing Egg Moves (with my luck) means 6IV would be almost instant.
3. I have Rain Dish Tentacool. I just did a quick breed with a highly leveled one and sent the parent home, so I only have a few. I'm trying to recall where I put them now; I hope I left them in the Bank. I can IV them anytime and add the Egg Moves that interest me using one of the females to breed each move on a separate set, then just level up one of each and combine them before Dittoing for IVs.
That Squirtle would be great. Since I've cloned mine (you can choose Croagunk that are "Somewhat vain" or "Capable of taking hits", but otherwise identical as Jolly, Poison Touch, IVs, and Drain Punch; you can also get a Heracross that is vain, or "Mischievous", but again identical with 6IVs, Rock Blast, etc.), they can be traded and kept. For that reason, I can clone and return the Squirtle if you want.
If for the Heracross you want the 5IV for battle reasons (avoiding attacks that use your SpA IV stat), I have the Adamant male 31/31/31/xx/31/31. In that instance, I might have to change one of the requests, but I'm going to look at more of your list (do you have a new top three?).
Can I still ask for that Treecko? I'll offer to clone that too if you really want to keep that one, but you did list it for trade. :)
Chimchar I mentioned. I like the idea of a Fire type with an Electric move. Genius for water use.