Simplify the following text for a Grade 7 native English-speaking person.
Original: , Yoshi 's Safari , Hotel Mario , Mario & Luigi : Superstar Saga , where they played the role of minibosses , and New Super Mario Bros. .
Simplified: In Super Mario Bros. 3 , and Mario & Luigi : Superstar Saga the Koopa Kids have not appeared since , Bowser appears in a castle as the final boss .