This is with Goku at Super Saiyan 4 and Level 3 Deathmoves.
Well, the game's finally dropped in the US! And here we are with a Goku combo. I can't cancel his <P+K chain well enough to connect, so I left it out.
With the Heavy Smash, I'm actually doing a normal cancel and then quickly performing the hit. It takes a few minutes of practice and is mostly only possible with axekick-type cancels.