Tekkon Kinkreet

Both anime are based on manga by the same author, so they have very similar art and story elements. Tekkon Kinkreet is more adventurous and trippy, while Ping Pong is more realistic. 

Both utilise unconventional and extremely creative art as mediums to enhance story-telling in the show. Both shows focus on two main characters, whom are great childhood friends and emphasise on their relationship as well as character growth. Both are also by the same mangaka Matsumoto Taiyou and have similar character designs. They have amazing soundtracks and the art is also extremely detailed especially in Tekkon Kinkreet. Overall both shows effectively capture the struggles of the two main characters and the adversities they face in their story.  

both series follow 2 protagonists with contrasting personalities. short series with no filler. 

Both are based on manga by Taiyou Matsumoto. Therefore, they have similar art styles and character designs, as well as story elements. Both anime focus on a duo of main character with contrasting personalities. The plots also contain a lot of metaphors and character development. 

Both anime are based on manga written by the same mangaka, and this similarity is noticeable in the unique character design and spectacular, fluid animation. Not only that, both focus on two main characters that are childhood friends that, despite being very different, are deeply important to eachother/balance one another out significantly. Both anime also carry similar messages about hope and friendship. Besides these things, these anime are also dissimilar in many respects: Ping Pong is a sports anime that has incredible depth through its use of character study, and Tekkon Kinkreet focuses on stray children and a power struggle within both their socio-political setting and their minds. However, somehow, these anime still follow notably parallel paths. read more 

Both have imaginative and at times bizzare storylines and feature very colorful and surreal art. Also, both were produced by Studio 4°C. 

-Similar art style -Similar character design .Bizarre adventure -Rare and unexpected events -too much and crazy imagination -strong psychological metaphors -Same Animation studio -Surreal animation effects 

Both films are visually impressive and quite artistic, using the medium to its fullest potential to tell stories that are rich in metaphors and symbolism. Furthermore, he dynamics between the characters, namely Sora/Umi and Kuro/Shiro are somewhat similar. 

Kaijuu no Kodomo follows the path of Tekkonkinkreet. A simple adventure story, that follows two boys, turns into an abstract and surreal miracle. Character design, music, visuals and atmosphere transform the anime into something experimental but that doesn't affect it in a bad way. These movies are the reason why Studio 4°C is one of the most stylish and unique studios in the industry right now. 

Both stories focus on homeless people who have to fight in order to protect their possessions. They are character-driven stories, filled with emotional and dramatic moments, and at the end of their journey, the main characters realize a lot of stuff about their lives. 

Strong brother bond, surreal world, violent and nice visuals. 

One thing that inextricably ties the two together is the bizarre architecture that each of the buildings flaunts with pride. The perennial, overwhelming sense of urban claustrophobia completely pervading the worldliness and freedom of expression of both settings makes either worthy of being recommended alongside the other. Granted, Eizouken hasn't shown enough of its pervasive atmosphere for me to contentiously opine on the state of affairs of its seemingly two-of-a-kind urban landscape. Though, it does feel rather out of touch with its feature-length counterpart in terms of the facial cues that illustrate the characters' emotions. 

They're both mindscrews of movies that blend the settings' realities with elements of the human psyche, with amazing animation to boot.  

Story-wise, both works have strong character development for multiple characters, and both stories are also propelled by conflicts centering shady and complicated organizations (in short: similar antagonists). Directing/art-wise, every scene from both anime feel like an art piece: carefully done, and detailed. Both use deranged (and fantastic) animation to depict disturbing moments. While the physical and violent moments are obviously disturbing (and frequent), the focus on how a character's psyche gets impacted is more jarring. While Kemonozume is a lot darker than Tekkon Kinkreet, the odd humor is still there.