Board Thread:General Discussion/@comment-6527064-20140413142231/@comment-24591972-20140425194305

Ultimates wrote: Big Chill is not a bug. Uprgrade is not a bug. Nanomech is not a bug. Stinkfly doesn't seem to be a bug.

It could be Eatle (though even he is not a 'bug') or Ball Weevil (but he is small, but bigger than a bug) or Crashopper (though he is a grasshopper) I'm not saying it's Upgrade but the name Big Bug could be based off a computer bug.