It's pretty hard to take a character who has the word "silly" in its name seriously...
Anyway, I clearly saw some of the cheapest characters in existance in his intro. SuperMario64... Rare Akuma... Even Omega Tiger Woods... I've seen a vid of him. I believe he has the Bowser Swing, Omega Tiger Woods' move, and even Shun Goku Satsu.
There are way too many characters that use Shun Goku Satsu.
Here's a list to prove it:
Rare Akuma, Bloo, Gumball, Heather, Chuck Norris, Weegee, Dancing Banana, Mr. Bean, Zim (Old Version), Ed, Eddy, Homer Simpson, Ronald McDonald, Evil Donald, Konata, Sonic, and many more!
The move is so popular, because it is a cheap instant-killer! (Note: The Shun Goku Satsus of Homer Simpson, Ronald McDonald, Konata, and Sonic are powerful, but not instant killers. Same with Bloo's if the character has enough health.)