eh I get the official say. He'll stay when 3.0 comes. He's back now. (He will also have a part in LLSIF Corrupted) beta: https://beta.scratch.mit.edu/#239174119
credit: @happygappy aka @ScratchKrader2003 (Original Project) if you're running this project in scratch 3.0 beta, nothing bad has happened to spikia, same as the thumbnail, just that the speech bubble and thought bubble changed, and maybe more fps.