BOXBOY! for the Nintendo 3DS was James' 11th Let's Play. The series ran from May 15th, 2015 to October 15th, 2015.
You can watch the series from the beginning by clicking here.
"From the creators of Kirby comes a new puzzle series about a boy made from a box!"
- The series icon featured above was created to match the current "JR" design, as with every series prior to Kirby: Planet Robobot