There is a slight problem with your N64 to Gamecube(wii) adapter, for us who are really serious about stick sensitivity.

The Virtual console's  emulator adjusts the controls so it will fit the classic Controllers stick, by increasing deadzone (to make diagnoals better) and sensitivity (to be able to have full range on the stick).

The problem here comes in with the n64 controller, it makes it feel really clunky.

From data collected from the TAS input plugin on Dolphin (gamecube/wii emulator) for Ocarina of Time VC (it might be different from other VC games) and the TAS input plugin for Mupen64 (n64 emulator), we found the following (numbers are out of 128 maximum):

8 on N64 = 23 on VC
26 on N64 = 36 on VC
52 on N64 = 47 on VC
62 on N64 = 57 on VC
64 on N64 = 57 on VC

We performed a regression on these values and got the following equation:
Predicted VC input = -0.000054239(N64 input)^4 + 0.0084500457(N64 input)^3 - 0.4395273207(N64 input)^2 + 9.020160963(N64 input) - 25.13579965

or

y = -0.000054239x^4 + 0.0084500457x^3 - 0.4395273207x^2 + 9.020160963x - 25.13579965

(one is in context and the other is just with x and y)

The r^2 value for this equation is 1, so 100% of the variability in the VC inputs is accounted for by the N64 inputs. However, it does seem a bit too convoluted to be the truth, so I would take it with a grain of salt.