Looked a bit at the training mode. And tried to see if there was a trick to get like infinite combos. I tried with Shieks jab and also Mewtwos jab at DK,. and I got it high to like some hundreds. With Shiek or Mewtwo jabbing at DK with standing next to a wall, like at Onett. But with Ness you can actually get pretty much infinite combo. Pick Ness, go to New Pork City, and stand at the left, where there's a wall, and have DK there. Put the damage to fixed damage and just use PK fire over and over again. It will just score higher and higher on the combo meter. If you have some sort of turbo controller or something like that, you could just have it hold the B button and then just let it continue al day long. Else you have to press B all the time with the risk of messing up the combo. Also in Smash Ultimate, the combo counter goes passed 999, and goes higher, even higher than 10 000 (https://www.youtube.com/watch?v=r3G8oIr1ZK8). I don't know how high it can go (would be cool to know). But this trick, with Ness and PK Fire, I think can continue on forever. ^^ Would be cool seeing someone get max score (don't know what that is).