 Since his first cameo in the series , director Tetsuya Nomura has stated that Roxas is an important character to the series , and that in order to explain his back story in more detail than done in Kingdom Hearts II , Kingdom Hearts 358 / 2 Days was created . Since his introduction in Kingdom Hearts II , Roxas has received positive critical response from video game publications with most of them focusing on his development in 358 / 2 Days . Various types of merchandising have been released based on his character . 
 Since his first cameo in the series , director Tetsuya Nomura <a href='been_done' title='1'><mark>has</mark></a> stated that Roxas is an important character to the series , and that in order to explain his back story in more detail than done in Kingdom Hearts II , Kingdom Hearts 358 / 2 Days was created . Since his introduction in Kingdom Hearts II , Roxas <a href='been_done' title='2'><mark>has</mark></a> received positive critical response from video game publications with most of them focusing on his development in 358 / 2 Days . Various types of merchandising <a href='been_done' title='3'><mark>have</mark></a> been released based on his character . 
Since his first cameo in da series , director Tetsuya Nomura done stated that Roxas is an important character to the series , and dat in order to explain his back story in more detail than done in Kingdom Hearts II , Kingdom Hearts 358 / 2 dayz was created . Since his introduction in Kingdom Hearts II , Roxas done received positive critical response from video game publications with most of them focusing on his development in 358 / 2 Days . Various types of merchandising done been released based on his character .