If you want a higher or lower powered version of the archetype, then Id suggest looking to a Commander like Hofri Ghostforge or Joshua, Phoenixs Dominant, both of which I have lists for here and here
While it is most likely only a coincidence, a conspiracy theorist might claim some unlucky person at WotC or the printing company received the unenviable task of fishing thousands of Clefable cards out of stacks of cut cards as they were needed as prerelease promos
Additionally, Pikachu and Jigglypuff were printed in English on Japanese card stock on March 1, 1999, in the Hyper CoroCoro Spring Issue
I haven't researched either commander yet so I can't give a definite answer, but my gut reaction is that Sisay, Weatherlight Captain is probably stronger
I knew from other people and asking around that he was playing Flygon / Machamp, and that it would be the hardest match of the day, but I hoped a Power Lock early would be enough to seal the win