Order them here: Mr. Spaghetti Shirts at Big Cartel
Mr. Spaghetti is a huge star of telephone poles in Allston and /r/boston Reddit posts.
If you don’t know who or what this is all about, read this post: Mr. Spaghetti The Golden Retriever and figure it out for yourself.
This mural artwork featuring a bunch of bug-eyed monsters extends all the way down and around both sides of the stairwell leading down to the store.
Video view of inside of stairwell and sidewalk view of the storefront (please pardon the trash; Allston is a funky neighborhood):