Mr. Blik sitting high and mighty while holding an unknown object.
Slider
Mr. Blik gets surprised by something behind him.
A completed puzzle
This Means War
Blik's victory pose
Mr. Blik is his important hat. (The pupils are missing)
2007 McDonald's Happy Meal Toys
A toy modeled after Mr. Blik, possibly after the animation of him pulling his tongue inside and out in Go Gomez! Go! and again in Love Jackal. His eyes and tongue extend out when you rotate his tail.
Scene It? Nickelodeon DVD Board Game
Mr. Blik's step on the Nick "Scene-It?" board.
According to this, Blik hired an artist to chisel Blik's likeness into a huge block of ice.
Comics
Gordon and Waffle introduce their new Slug King to Mr. Blik, leading him to assert his dominance.
The brothers enjoy a day of fishing, but Blik is dismayed when he is without a fish.
Blik's luck with fishing changes.
Wallpapers
Production Art
Blik is seen on Mr. TenNapel's desk.
Blik is seen on a storyboard behind Mr. Girard.
Concept art of Mr. Blik's Halloween costume in "Scaredy Cat".
I'm guessing the three cats originally lived separately.