User blog comment:Chesknight/Ask Chesknight/@comment-5035900-20150301013034/@comment-24281142-20150301013600

Probably Silver VS Mewtwo.

With the Pokémon Battle Royale, Wiz and Boomstick had given me an idea on what I had to look for to determine the victor, and once I knew it was pretty easy to do up. Plus the fact that almost everything I'd need to know was on their Bulbapedia page (which I can confirm is 100% accurate) made it pretty easy to find the stuff.

Meanwhile with Silver VS Mewtwo, I had to do a lot more thinking about how they could counter each other, what was most likely to happen, I didn't do anything with it but I was preparing counter-arguments in my brain in case someone brought up anything against my verdict.

So yeah, Silver VS Mewtwo was tougher.