Majin Ghidorah wrote: Joe Whyte is the only replacement for Ernest. We can't revive Ernest. His body is ashes.
I don't think, even if his body was still in full form, that he'd want us to revive him. Gosh he's been gone since July '12. It's Feb '14. That's a long time without a super hero.
BTW Kenny the Cat originally was going to be a compensation for Ernest's death. But changes were made to the character, and episode, that he wouldn't be a good replacement. So the episode, after being rewritten, and reproduced, made Kenny a one time character, who probably won't come back to Bikini Bottom. But it's still a good episode.