1. VC: Earthbound (not sure if this counts though because it was sold at retail at one point on SNES, and is still being sold at retail today with download cards)
2. Trine 2
3. Castle Strom

Probably Runner 2.

I get the feeling that Toki Tori 2+ could have been an amazing game if it was a little clearer and a little less "hardcore." Just way too hard for simple folk like myself

I love Cloudberry Kingdom...

I was gonna say Trine 2 but I was ashames so I didn't post anything. Now I see other people saying Trune 2 so I'm gonna join in!

Going to try one or two of the other games when I get home, too.

Little Inferno?

Trine 2, although it's really difficult to choose because there are so many quality titles to choose from. Nano Assault Neo, Little Inferno, Mighty Switch Force, Toki Tori 1 & 2, EDGE and Puddle also deserve honourable mentions.

I have: Trine 2, The Cave, Little Inferno, Mighty Switch Force 1 and 2.

I might be forgetting something. Anyway, I have $20 on my eShop ID for use between Wii U and 3DS and I want something new to buy. Any games that take advantage of the pad in a meaningful way?

This might be the thread in which to state that I'm looking forward to playing Unepic...
I'm also considering Knytt Underground...

I'm lovin Nano Assault: Neo.  I've had Trine 2 for over a year now I believe, but haven't started it yet.  Star Wars Pinball is awesome, also.

Im waiting for teslagrad.
for now, is NaN.