Alex the lion is Marty 's best friend .
`` Marty 's best friend is Alex the lion , who enjoys showing off for the public and is somewhat self-centered due to his celebrity status as `` '' the King of New York City '' '' attempts to cheer Marty up , but Marty , still unsatisfied , gets some tips from the zoo 's penguins�Skipper , Kowalski , Rico , and Private�who are trying to escape the zoo , and follows them out . ''
Madagascar -LRB-2005 film-RRB-