"Reuben Stoppable" - "unstoppable" phonetic pun, albeit more loosely than the typic, consistent phonetic -on theme to which surprisingly this Stoppable does not adhere (however, -en and -on do form a sort of equivalency as relative to the intended -un). The "unstoppable" wordplay is also relative to the "impossible" wordplay the Possibles bear, in that both are superlatives. "Reuben," also, is relative to Ron in that an "o" is replaced by an "eube" cluster; the introductory and outroductory letters sustain themselves.
Confidence: 85