The differences aren't just raw CPU and GPU power though. The GC, Wii, and Wii U had a couple different high bandwidth and low latency RAM[0] types in the GPU.

The differences aren't just raw CPU and GPU power though. The GC, Wii, and Wii U had a couple different high bandwidth and low latency RAM[0] types in the GPU. The low latency and speed likely led to access patterns that are harder to emulate with a Pi's unified and relatively slow DRAM. [0] https://en.m.wikipedia.org/wiki/1T-SRAM https://en.m.wikipedia.org/wiki/1T-SRAM