Saw these in store last weekend:
https://www.uniqlo.com/us/en/ut-g...
They had a previous line (or two) with Nintendo-licensed shirts a while back.
I'm personally a fan of their t-shirts. They are very soft and well-made for the price. They do run a bit small, though.
If you buy 2+, they're only $9.99 each. If you don't have a store near you, they are offering free shipping until 4/23.