I work as a tester for the English version of Smash Brothers for 3DS, but recently I have had to quit due to school getting ahead of me, and me needed to catch up. None the less I figure I might as well leak what I can, as anonymously as possible. The perfect thing about this site is that it kind of blends in. It is however very awkward, and I'm not sure I should do this, but I think I will anyway.
The developers where probably smart in only giving testers the portions of the game they want you to test. Some people act as specifically balance testers, but those people are honestly better at the game then me, and they get looks at the full mechanics of battle mode. I was more of an odd job tester, I'm doing IT, and I felt this would be a good way for me to get better at noticing bugs in games I wanted to make. Anyway, they give me bits of the game (usually very small) and I make sure there's nothing buggy that they missed.
I had to give back all my versions of the game, so I am working off of memory here, so please forgive me if I can't get too detailed or I get something a little off.
-There is a trophy of the Inking (Splatoon)
-The Double Cherry was a tested Item early on, but was taken away early once someone tried to to double an Pikmin and Olimar. You where only able to have 1 out on the field at a time (so only 1 person could double), but when doubling olimar it had to many things on screen to run well at the same time, when you faced against 3 other olimars and one of the more complex assist trophies.
-Ice Climbers returns: their grabs seemed to be better then ever, with fantastic range. but also, they seem to be a little weaker in all other aspects. It's also important to note that de syncing seems to be a little harder.
-Shulk is a newcomer: please forgive me, since I haven't played the game (I've been planning to over the holidays), but his neutral special makes his sword really big, his down special is basically counter, but it stuns to opponent temporarily, instead of you hitting them automatically. His recovery isn't fantastic, but it makes people trip if you hit them from the ground, it also has really good range from the ground. Also, his side smash does a HUGE amount of damage when you hit an opponent from behind. Seriously though, if you counter someone, you can hit them from behind and it HURTS.
-Robins customizable moves focus mainly on how many times you can use his books
-Lucina and Marth have custom moves that focus on their type of sword play specifically. For example, one of Lucina's neutral B customs has a lot longer total range, while Marths Neutral B custom increases increases the size of the tip temporarily,
--Links neutral B customs are Fire Arrow and Ice Arrow
-Ridley is in fact a newcomer: He's basically the opposite of Little Mac is the best way I think to put it. He has really good air time, and has fantastic aerial moves. His side special is a grab type move where he zooms forward and grabs someone. his neutral special is a breath attack thing.
-There are new things, similar to the codec calls in brawl. specifically the ability to talk with Hades and Varidi about characters you're facing.
-Event Matches are back, and they seem more like Melee then Brawl. There is actually an event to represent each character reveal trailer.
-Wario is also returning, although I've honestly never been able to get the hang of him.
-I'm sure theirs somethings if forgetting, and I'll comment those things if I remember them.