User blog comment:McGasher/Season 2 Hints (McGasher)/@comment-12846745-20150729173534/@comment-26323957-20150729173945

Lazytown is the series (I'lI' reveal it as he's the only character that obviously fits for a Death Battle), the fighter is Sportacus. Somewhere in this comment section there also are the right answers for 4 and 5 :)