Thank You Alexey ‘Cluster’ Avdyukhin!

Source

Schematic

Shopping list for components for Nes2Wii

C1 - 4.7uF

C2 - 0.1uF SMD

C3, C4 - 22pF SMD Select 0805 22pF ±5% from the drop down

D1, D2 - Red and Green LEDs

R1, R2, R3, R4 - 2.2KΩ SMD

R5, R6 - 400Ω SMD

Y1 - 16 MHz Crystal Oscillator 'SMD/ Through Hole'

ATMEGA16A

ISP 6 Pin Programer

I will probably be ordering Nes/Gen/SNES/N64/etc extension cables and cutting them up to use as leads from the Nes2Wii unless anyone knows where to order some surface mount controller sockets.