Keep in mind i don't have a wii u yet but i'd take the 3ds cuz they're getting superrr expensive these days and thats really cheap but i see wii us that price fairly often (at least where i live)

obviously a wii u i mean who wouldn't

the Wii U

i got this used wii u for 50$

A Wii U honestly, the 2DS is good enough but it doesn't feel great to use, I'm saying it after having one since 2015. The Wii U also has more possibilities.

2ds i have a wii u

id save up (no buy)