Petit Eva: Evangelion@School

Both have short episodes, are extremely funny, episodic, and are a spin-off of a more serious series. 

Both are 3-D like animated series with very short episodes and are very funny. 

Both are parody comedies done with 3D animation (Mechano: Scientific Attack Force has only part animated as 3D). Both have lots of randomness, and are full of unexplainable moments. Both have short episodes. 

Short anime that parodies originally angsty franchise by remaking the characters into a chibified form and putting them in comedic situations. 

Both are comedies with short episodes. Both have simple, computer genrated 3D animation. Both cosist of mostly unrelated short stories. Both are full of randomness and lolwuts. While Popee the Performer is more dementia, Petit Eva: Evangelion@School is more of a parody. 

Both are comedies done with 3D animation. Both have lots of randomness, sometimes unexplainable moments. Both have short episodes. 

ONA about mechs. なんとなく。 

both are ONA's,are funny,and short 

Very similar series. Short and humorous stories, 3D animation, somehow crazy (or even twisted) jokes, no voices - only music and various sound effects.